OPTICAL MATERIAL, COMPOSITION FOR OPTICAL MATERIAL; AND USE THEREOF 5 TECHNICAL FIELD [0001] The present invention relates to an optical material, a composition for an optical material, and use thereof. 10 BACKGROUND ART [0002] In the related art, a fact that exposure to ultraviolet rays exerts a negative influence on the eye is regarded as an issue. Furthermore, in recent years, a fact that blue light, Hhich is included 15 in natural light or in light emitted from liquid crystal displays of office machines, displays of portable devices such as smartphones or cellular phones, and the like, exerts an influence on the eye and makes the eye feel fatigue or pain has become an issue. Therefore, it is required to reduce exposure of the eye to ultraviolet rays and 20 blue light having a relatively short v1avelength of about 420 nm. [0003] Non-Patent Document 1 describes the influence of short-Havelength blue light of about 420 nm on the eye. In this document, damage of retinal neuronal cells (rat R28 25 retinal neuronal culture cells) irradiated with blue LED lights having different peak wavelengths of 411 nm and 470 nm was verified. As a result, it was found that while irradiation (4.5 W/m2 ) of blue l 2 light having a peak wavelength at 411 nm caused death of the retinal neuronal cells within 24 hours, blue light having a peak wavelength at 470 nm caused no change in the cells even if the cells were irradiated with this light at the same dose. This result shmvs that 5 in order to prevent eye injury, it is important to inhibit exposure of the eye to light having a 1vavelength of 400 mn to 420 nrn. [0004] Moreover, it is considered that if irradiated loJith blue light for a long time, the eye may suffer from fatigue or stress, and this 10 may lead to age-related macular degeneration. 15 RELATED DOCUMENT PATENT DOCUMENT [0005] [Patent Document 1] Japanese Unexamined Patent Publication No. 10-186291 [Patent Document 2] Japanese Unexamined Patent Publication No. 11-218602 [Patent Document 3] Japanese Unexamined Patent Publication No. 20 11-295502 [Patent Document 4] Japanese Unexamined Patent Publication No. 2000-147201 [Patent Document 5] Pamphlet of International Publication No. W02006/087880 25 NON-PATENT DOCUMENT [0006] [Non-Patent Document 1] The European journal of neuroscience l 5 10 vol. 34, Iss. 4, 548-558, (2011) DISCLOSURE OF THE INVENTION [0007] 3 Patent Document 1 discloses a technique for suppressing an average light transmittance within a range of equal to or greater than 300 nm and equal to or less than 400 nm by adding an ultraviolet absorber. [0008] Patent Document 2 discloses a technique that uses at least two kinds of ultraviolet absorber differing from each other in terms of maximum absorption wavelength. Patent Document 3 discloses a technique regarding a plastic lens that does not undergo yellowing, change in refractive index, and the like even when an ultraviolet 15 absorber is added thereto and does not experience decrease in mechanical strength. Ho1vever, the techniques disclosed in the documents merely relate to spectral transmittance at 400 nm, and the documents do not include a disclosure regarding light transmittance at 420 nm and 440 nm. 20 [0009] Patent Document 4 discloses a technique in which a benzotriazole derivative is added as an ultraviolet absorber, and discloses an ultraviolet transmittance in a plastic lens having a thickness of 1.1 mm at a wavelength equal to or iess than 400 nm. 25 [0010] Herein, when an ultraviolet absorber is used to cut a low-wavelength region of a 1vavelength of 400 nm to 420 nm, depending 4 on the type of the ultraviolet absorber, the resin turns yellow in some cases, or alternatively, the ultraviolet absorber is precipitated without being completely dissolved in a composition for an optical material and becomes opaque in some cases. 5 [0011] In the technique disclosed in Patent Document 5, fine iron oxide particles are added to a composition, and consequentially, a molded product is colored in some cases. Therefore, in the field of spectacle lenses or the like that require transparency, the technique 10 causes a problem in external appearance. Furthermore, a polycarbonate resin, which has been used as a transparent thermoplastic resin, needs to be further improved in terms of optical properties such as the refractive index or Abbe number. [0012] 15 The present invention includes the following. [1] An optical material that contains one or more kinds of ultraviolet absorber (a) having a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm, in which a light transmittance of the optical material having 20 a thickness of 2 mrn satisfies the follmving characteristics (1) to ( 3) ' ( 1) a light.transmittance at a wavelength of 410 nm is equal to or less than 10%, ( 2) a light transmittance at a \vavelength of 420 nrn is equal 25 to or less than 70%, and ( 3) a light transmittance at a wavelength of 440 nm is equal to or greater than 80%. 5 [2] The optical material described in [1], in which the ultraviolet absorber (a) is selected from benzotriazole-based compounds. [3] The optical material described in [1] or [2], in which the 5 ultraviolet absorber (a) is 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-chlorobenzotriazole. [4] The optical material described in any one of [1] to [3], that contains at least one kind selected from polyurethane, polythiourethane, polysulfide, polycarbonate, poly(meth)acrylate, 10 and polyolefin. [5] The optical material described in any one of [1] to [4], including a lens substrate, and a film layer and a coating layer that are optionally laminated over the lens substrate. [6] The optical material described in any one of [1] to [5], 15 including the lens substrate, and the film layer and the coating layer that are optionally laminated over the lens substrate, in which the ultraviolet absorber (a) is contained in at least one of the lens substrate, the film layer, and the coating layer. [7] The optical material described in any one of [1] to [6] that 20 is obtained from a composition for an optical material containing one or more kinds of ultraviolet absorber (a) having a maximum absorption peak wi"th"in a range of equal to or greater than 350 nm and equal to or less than 370 nm and a resin for an optical material (b) or a polymerizable compound (c), in which the amount of the 25 ultraviolet absorber (a) contained in the composition is 0.3% by weight to 2% by Height >vi th respect to the total weight of the resin for an optical material (b) or the polymerizable compound (c) . 6 [8] The optical material described in [7], in which the ultraviolet absorber (a) is one or more kinds of compound selected from benzotriazole-based compounds. [9] The optical material described in [7] or [8], in 1-1hich the 5 resin for an optical material (b) is at least one kind selected from polycarbonate, poly(meth)acrylate, and polyolefin. [10] The optical material described in [7] or [8], in which the polymerizable compound (c) is a combination of a polyisocyanate compound and a polyol compound, a combination of a polyisocyanate 10 compound and a polythiol compound, a polyepithio compound and/or a poiythietane compound, or a combination of a polyepithio compound and a polythiol compound. [11] A plastic spectacle lens comprised of the optical material described in any one of [1] to [10]. 15 [12] A composition for an optical material including one or more kinds of ultraviolet absorber (a) having a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm, and a resin for an optical material (b) or a polymerizable compound (c) , in 1vhich the amount of the ultraviolet 20 absorber (a) contained in the composition is 0. 3% by 1-1eight to 2% by 1-1eight 1-1ith respect to the total weight of the resin for an optical material (b), or the polymerizable compound (c) . [13] The composition for an optical material described in [12], in which the ultraviolet absorber (a) is one or more kinds of compound 25 selected from benzotriazole-based compounds. [14] The composition for an optical material described in [12] or [13], in which the resin for an optical material (b) is at least --- ----- ---------------- 7 one kind selected from polycarbonate, poly(meth)acrylate, and polyolefin. [15] The composition for an optical material described in [12] or [13], in which the polymerizable compound (c) is a combination 5 of a polyisocyanate compound and a polyol compound, a combination of a polyisocyanate compound and a polythiol compound, a polyepithio compound and/or a polythietane compound, or a combination of a polyepithio compound and a polythiol compound. [16] A manufacturing method of an optical material, including 10 a step of obtaining the composition for an optical material described in any one of [12] to [15] by mixing the ultraviolet absorber (a) with the resin for an optical material (b) or the polymerizable compound (c), and a step of curing the composition for an optical material. 15 [17] A molded product obtained by curing the composition for an optical material described in any one of [12] to [15]. [18] An optical material comprised of the molded product described in [17]. [19] A plastic spectacle lens including a lens substrate 20 comprised of the molded product described in [17]. [20] A film obtained from the molded product described in [17]. [21] A coating material comprised of the composition for an optical material described in any one of [12] to [15]. [22] A plastic spectacle lens including a layer comprised of 25 the film described in [20] over at least one surface of a lens substrate. [23] A plastic spectacle lens including lens substrate layers 8 over both surfaces of the film described in [20]. [24] A plastic spectacle lens including a coating layer, which is obtained by curing the coating material described in [21], over at least one surface of a lens substrate. 5 [0013] According to the present invention, it is possible to provide an optical material Hhich exerts a strong effect of blocking from harmful ultraviolet rays to blue light of about 420 nm and has an excellent external appearance that is colorless and transparent. The 10 optical material of the present invention has excellent optical characteristics such as a high refractive index and a high Abbe number, has an excellent external appearance that is colorless and transparent, and can prevent injury including eye fatigue and stress by reducing influence of harmful light on the eye. Therefore, the 15 optical material can be suitably used particularly as a plastic spectacle lens. 20 25 BRIEF DESCRIPTION OF THE DRAWINGS [ 00 14] FIG. 1 is a chart showing ultraviolet-visible light spectra of lenses prepared in Examples 1 and 3 and Com~arative example 2. FIG. 2 is .. a chart showing ultraviolet -visible light spectra of ultraviolet absorbers, which are used in examples and comparative examples, in a chloroform solution. DESCRIPTION OF EMBODIMENTS [0015] l ~~------------------------------------------ 9 Hereinafter, embodiments of the present invention will be specifically described. The optical material of the present invention contains an ultraviolet absorber (a) having a maximum absorption wavelength of 5 equal to or greater than 350 nm and equal to or less than 370 nm, and a light transmittance of the optical material having a thickness of 2 mm satisfies the following characteristics (1) to (3) . 10 15 (1) A light transmittance at a wavelength of 410 nm is equal to or less than 10%. (2) A light transmittance at a wavelength of 420 nm is equal to or less than 70%. (3) A light transmittance at a wavelength of 440 nm is equal to or greater than 80%. [ 0016] The present inventors found that by using a specific ultraviolet absorber having a maximum absorption 1-1avelength 1-1ithin a range of equal to or greater than 350 nm and equal to or less than 370 nm, an optical material that selectively absorbs light in a low-wavelength region of 400 nm to 420 nm can be obtained, and the 20 optical material has excellent optical characteristics such as a high refractive index and a high Abbe number and has an excellent external appearance that is. colorless and transparent. Based on these findings, they completed the present invention. That is, because the optical material contains the ultraviolet 25 absorber (a) and has a light transmittance that is within the aforementioned range at a specific wavelength, the optical material has an excellent external appearance including transparency, has 10 excellent optical characteristics such as a high refractive index and a high Abbe number, is prevented from becoming colored, and can prevent injury including eye fatigue and stress. Furthermore, because the optical material has a light transmittance of equal to 5 or greater than 80% at a wavelength of 440 nm, it can be obtained in the form of a colorless and transparent optical material having excellent an external appearance. [0017] Hereinafter, embodiments of the present invention will be 10 specifically described. In a first embodiment, an embodiment will be described in which an optical material is prepared by using a composition for an optical material containing the ultraviolet absorber (a). In a second embodiment, an embodiment will be described in which a molded product 15 is prepared by using a composition for an optical material not containing the ultraviolet absorber (a), and an optical material is prepared by adding the ultraviolet absorber (a) to the molded product by a predetermined method. [0018] 20 [First embodiment] A composition for an optical material of the present embodiment contains one or more kinds of ultraviolet absorber (a) having a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm, and a resin for an optical material 25 (b) or a polymerizable compound (resin monomer) (c). Hereinafter, each of the components 1-1ill be described in detail. [0019] --------------------------- 11 [Ultraviolet absorber (a)] The ultraviolet absorber (a). used in the present embodiment is not particularly limited as long as it has a maximum absorption Navelength 1vithin a range of equal to or greater than 350 nm and equal 5 to or less than 370 nm 1vhen being dissolved in a chloroform solution. As the ultraviolet absorber (a), benzotriazole-based compounds are preferably used. In the present embodiment, as the ultraviolet absorber (a), one or more kinds of such ultraviolet absorbers are preferably used. 10 Furthermore, the composition for an optical material may contain tl'lo or more different kinds of the ultraviolet absorber (a). Herein, any of ultraviolet absorbers constituting the ultraviolet absorber (a) has a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm. 15 [0020] The ultraviolet absorber (a) can be contained in any of a lens substrate, a film layer, and a coating layer which will be described later. As the film layer or the coating layer, it is possible to use materials having polarization properties or materials having 20 photochrornic properties. Preferable examples of the ultraviolet absorber (a) used in the present embodiment include 2-(2-hydroxy-3-t-butyl-5-methyphenyl)-chlorobenzotriazole. Examples of commercially available products thereof include 25 TINUVIN326 manufactured by BASF Corporation, SEESEORB703 manufactured by SHIPRO KASEI KAISHA, LTD., Viosorb550 manufactured by KYODO CHEMICAL CO., LTD., KEMISORB73 manufactured by CHEMIPRO l KASEI, and the like. [0021] 12 [Resin for optical material (b) or polymerizable compound (c)] In the present embodiment, the composition ·for an optical 5 material contains the resin for an optical material (b) or the polymerizable compound (c) . The resin for an optical material and a resin obtained from the polymerizable compound (hereinafter, all of the resins will be simply referred to as a "resin" in some cases) are preferably transparent resins. 10 [0022] (Resin for optical material (b)) As the resin for an optical material (b), polycarbonate, poly(meth)acrylate, polyolefin, cyclic polyolefin, polyallyl, polyurethane urea, a polyene-polythiol polymer, a ring-opening 15 metathesis polymer, polyester, and an epoxy resin can be preferably used. These are materials (transparent resins) having a high degree of transparency, and can be suitably used for optical materials. At least one kind selected from polycarbonate, poly (meth) acrylate, and polyolefin can be more preferably used as the materials. These are 20 materials having a high degree of transparency, and can be suitably used for optical materials. Herein, one kind of these materials may be used singly, or a composite material consisting of these materials may be used. 25 [0023] The polycarbonate can be obtained by a method of causing a reaction between an alcohol and phosgene or a reaction between an alcohol and chloroforrnate, or by a method of causing an ester exchange 13 reaction of a carbonic diester compound. It is also possible to use general polycarbonate resins in the form of commercially available products. As the commercially available products, a Panlite series manufactured by Teijin Chemicals Ltd. and the like can be used. The 5 composition for an optical material of the present embodiment can contain the polycarbonate as the resin for an optical material (b) . [0024] Examples of the poly (meth) acrylate include poly (meth) acrylates of alkane polyols such as ethylene glycol di (meth) acrylate, propylene 10 glycol di(meth)acrylate, butylene glycol di(meth)acrylate, neopentyl glycol di (meth) acrylate, hexylene glycol di (meth) acrylate, trimethylolpropane tri(meth)acrylate, and pentaerythritol tetra (meth) acrylate; polyoxyalkane polyol poly (meth) acrylates such as diethylene glycol di(meth)acrylate, triethylene glycol 15 di(meth)acrylate, polyethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, polypropylene glycol di(meth)acrylate, dibutylene glycol di(meth)acrylate, and dipentaerythritol hexa(meth)acrylate; and the like. The composition for an optical material of the present 20 embodiment can contain the poly(meth)acrylate as the resin for an optical material (b) . [ 0025] The polyolefin is prepared by polymerizing at least one kind of olefin selected from cx-olefins in the presence of a known catalyst 25 for olefin polymerization such as a Ziegler-Natta catalyst, a metallocene catalyst, or a so-called post-metallocene catalyst. The ex-olefin monomer may be composed of a single component, or may be 14 obtained by copolymerizing multiple components. [0026] In manufacturing the polyolefin, the polymerization reaction of the olefin can be performed by a liquid-phase polymerization method 5 such as a solution polymerization, suspension polymerization, or bulk polymerization, a gas-phase polymerization method, or other known polymerization methods. For manufacturing the polyolefin, liquid-phase polymerization methods such as solution polymerization and suspension polymerization (slurry polymerization) are preferably 10 used, and a suspension polymerization (slurry polymerization) method is more preferably used. For the polymerization, known conditions can be applied as temperature or pressure conditions. The composition for an optical material of the present embodiment can contain the polyolefin as the resin for an optical 15 material (b). [0027] The cyclic polyolefin is prepared by polymerizing at least one kind of cyclic olefin selected from cyclic olefins in the presence of a knm-m catalyst for olefin polymerization. The cyclic polyolefin 20 may be composed of a single monomer, or may be obtained by copolymerizing multiple components. As the cyclic polyolefin, Apel (trademark) manufactured by Mitsui Chemicals, Inc. can be suitably used because it has a high degree of transparency. 25 [0028] The polyallyl is manufactured by polymerizing at least one kind of allyl group-containing monomer selected from allyl group-containing monomers in the presence of a known polymerization 5 15 catalyst generating a radical. As the allyl group-containing monomers, allyl diglycol carbonates or diallyl phthalates are commercially available in general, and these can be suitably used. [0029] The polyurethane urea is a product obtained by reacting a polyurethane prepolymer and a diamine curing agent, and typical examples thereof include TRIVEX (trademark) available from PPG Industries, Inc. A polyurethane polyurea is a material having a high degree of transparency and can be suitably used. 10 [0030] The polyene-polythiol polymer is produced by addition polymerization or ethylene chain-like polymerization of a polyene compound having two or more ethylenic functional groups in a one molecule and a polythiol compound having two or more thiol groups 15 in a one molecule. [0031] Examples of the polyene compound in the polyene-polythiol polymer include allyl alcohol derivatives, esters of (meth)acrylic acid and polyol, urethane acrylate, divinyl benzene, and the like. 20 At least one kind of these can be used. Examples of the allyl alcohol derivatives include triallyl isocyanurate, triallyl cyanurate, diallyl maleate, diallyl fumarate, diallyl adipate, diallyl phthalate, triallyl trimellitate, tetraallyl pyromellitate, glycerin diallyl ether, trimethy1ol propane diallyl ether, 25 pentaerythritol diallyl ether, sorbitol diallyl ether, and the like. Examples of the polyol in the esters of a (meth)acrylic acid and a polyol include ethylene glycol, propylene glycol, 1,4-butanediol, ----------------------- 16 1,6-hexanediol, glycerin, trimethylol propane, pentaerythritol, sorbitol, and the like. [0032] The ring-opening metathesis polymer is a polymer obtained by 5 performing ring-opening polymerization of cyclic olefins by using a catalyst. The cyclic olefins that can be subjected to the ring-opening polymerization are not particularly limited as long as they have a cyclic structure, and examples thereof generally include monocyclic cycloalkenes, monocyclic cycloalkadienes, polycyclic • 10 cycloalkenes, and polycyclic cycloalkadienes having 3 to 40 carbon atoms. Specific examples of the monocyclic cycloalkenes include cyclobutene, cyclopentene, cyclohexene, cyclooctene, and the like. Examples of the monocyclic cycloalkadienes include cyclobutadiene, 1,3-cyclopentadiene, 1,3-cyclohexadiene, 1,4-cyclohexadiene, 15 1,5-cyclooctadiene, and the like. Examples of the polycyclic cycloalkenes include norbornene, tetracyclo [ 6. 2. 1. 1 3 ' 6 • 02 ' 7 ] dodec-4-ene, and the like. Examples of the polycyclic cycloalkadienes include norbornadiene, dicyclopentadiene, and the like. These may be substituted with 20 oxygen, sulfur, halogen, or the like, and may be hydrogenated. Preferable examples thereof include ARTON (trademark) of JSR Corporation and the like. [0033] The polyester is obtained by condensation polymerization 25 performed in the presence of a knm-m catalyst for manufacturing polyester, such as Lewis acid catalyst repr.esented by an antimony or germanium compound, an organic acid, or an inorganic acid. 17 Specifically, the polyester refers to a polymer composed of At least one kind selected from polyvalent carboxylic acids including a dicarboxylic acid and ester-forming derivatives thereof and one, t>vo, or more kinds .selected from polyols including glycol, a polymer 5 composed of a hydroxycarboxylic acid and an ester-forming derivative the:ceof, or a polymer composed of a cyclic ester. [0034] Examples of the dicarboxylic acid include saturated aliphatic dicarboxylic acids, such as oxalic acid, malonic acid, succinic acid, 10 glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, decanedicarboxylic acid, dodecanedicarboxylic acid, tetradecanedicarboxylic acid, hexadecanedicarboxylic acid, 1,3-cyclobutanedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 15 1, 3-cyclohexanedicarboxylic acid, 1, 4-cyclohexanedicarboxylic acid, 2, 5-norbornanedicarboxylic acid, and dimer acids, and ester-forming derivatives thereof; unsaturated aliphatic dicarboxylic acids, such as fumaric acid, maleic acid, and itaconic acid, and ester-forming derivatives thereof; and aromatic dicarboxylic acids, such as 20 orthophthalic acid, isophthalic acid, terephthalic acid, 5- (alkaline metal)sulfoisophthalic acid, diphenic acid, 1,3-naphthalene dicarboxylic acid, 1,4-naphthalene dicarboxylic acid, 1,5-naphthalene dicarboxylic acid, 2,6-naphthalene dicarboxylic acid, 2,7-naphthalene dicarboxylic acid, 4,4'-biphenyldicarboxylic 25 acid, 4,4'-biphenylsulfone dicarboxylic acid, 4,4'-biphenylether dicarboxylic acid, 1,2-bis(phenoxy)ethane-p,p'-dicarboxylic acid, pamoic acid, and anthracene dicarboxylic acid, and ester-forming 18 derivatives thereof. Among these dicarboxylic acids, terephthalic acid and naphthalene dicarboxylic acid are preferable, and 2, 6-naphthalene dicarboxylic acid is particularly preferable, since these makes the obtained polyester exhibit excellent properties and 5 the like. The polyester optionally contains other dicarboxylic acids as constituents. Examples of the polyvalent carboxylic acids other than these dicarboxylic acids include ethane tricarboxylic acid, propane tricarboxylic acid, butane tetracarboxylic acid, pyromellitic acid, trimellitic acid, trimesic acid, 10 3,4,3' ,4'-biphenyltetracarboxylic acid, ester-forming derivatives thereof, and the like. [0035] Examples of the glycol include aliphatic glycols such as ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 15 diethylene glycol, triethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 2,3-butylene glycol, 1,4-butylene glycol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 20 1,4-cyclohexanedimethanol, 1,4-cyclohexanediethanol, 1,10-decamethylene glycol, 1,12-dodecanediol, polyethylene glycol, polytrimethylene glycol, and polytetramethylene glycol; and aromatic glycols such as hydroquinone, 4,4'-dihydroxybisphenol, 1,4-bis(~-hydroxyethoxy)benzene, 25 1,4-bis(~-hydroxyethoxyphenyl)sulfone, bis(p-hydroxyphenyl)ether, bis(p-hydroxyphenyl)sulfone, bis(p-hydroxyphenyl)methane, 1,2-bis(p-hydroxyphenyl)ethane, bisphenol A, bisphenol C, 19 2,5-naphtha1enediol, and glycols obtained by adding ethylene oxide to the above glycols. Among these glycols, ethylene glycol, 1,3-propylene glycol, 1, 4-butylene glycol, and 1, 4-cyclohexane dimethanol are preferable. 5 Examples of polyols other than these glycols include trimethylolmethane, trirnethylolethane, trimethylolpropane, pentaerythritol, glycerol, hexanetriol, and the like. [0036) As the polyester, polyethylene terephthalate, polybutylene 10 terephthalate, polypropylene terephthalate, poly(1,4-cyclohexanedimethyleneterephthalte), polyethylene naphthalate, polybutylene naphthalate, polypropylene naphthalate, and copolymers thereof are preferable. 15 [0037) The epoxy resin is a resin obtained by ring-opening polymerization of an epoxy compound. Examples of the epoxy compound include phenol-based epoxy compounds obtained by a condensation reaction between an epihalohydrin compound and a polyvalent phenol compound such as bisphenol A glycidyl ether or bisphenol F glycidyl 20 ether; alcohol-based epoxy compounds obtained by condensation beh1een an epihalohydrin compound and a polyol compound such as hydrogenated bisphenol A glycidyl ether, hydrogenated bisphenol F glycidyl ether, or cyclohexanedimethano1; glycidyl ester-based epoxy compounds obtained by condensation between an epihalohydrin compound 25 and a polyvalent organic compound such as 3,4-epoxycyclohexylmethyl-3' ,4'-epoxycyclohexane carboxylate or 1,2-hexahydrophthalic acid diglycidyl ester; amine-based epoxy l --------------- 20 compounds obtained be condensation between a primary and secondary amine compounds and an epihalohydrin compound; and the like. The examples also include aliphatic polyvalent epoxy compounds such as vinylcyclohexene diepoxide like 4-vinyl-1-cyclohexane diepoxide, 5 and the like. [0038] (Polymerizable compound (c)) In the present embodiment, the composition for an optical material can contain the polymerizable compound (c) , and as the resin 10 obtained from the polymerizable compound (c), polyurethane, polythiourethane, polysulfide, and the like can be preferably used. These are materials (transparent resins) having a high degree of transparency, and can be suitably used for optical materials. 15 [0039] The polyurethane is obtained from a polyisocyanate compound and a polyol compound as the polymerizable compound (c). The polythiourethane is obtained from a polyisocyanate compound and a polythiol compound as the polymerizable compound (c) . The composition for an optical material can contain the follmling 20 polymerizable compound· (c) constituting those resins. [0040] Examples of the polyisocyanate compound include aliphatic polyisocyanate compounds such as hexamethylene diisocyanate, 2,2,4-trimethylhexane diisocyanate, 2,4,4-trimethylhexamethylene 25 diisocyanate, lysine diisocyanatomethyl ester, lysine triisocyanate, m-xylylene diisocyanate, a, a, a' ,a'-tetramethylxylylene diisocyanate, bis(isocyanatomethyl)naphthalene, mesitylene l -------------------------- 21 triisocyanate, bis(isocyanatomethy1)su1fide, bis(isocyanatoethy1)su1fide, bis(isocyanatomethyl)disu1fide, bis(isocyanatoethyl)disulfide, bis(isocyanatomethylthio)methane, bis(isocyanatoethylthio)methane, bis(isocyanatoethylthio)ethane, 5 and bis(isocyanatomethylthio)ethane; alicyclic polyisocyanate compounds such as isophorone diisocyanate, bis(isocyanatomethyl)cyclohexane, dicyclohexylmethane-4,4'-diisocyanate, cyclohexane diisocyanate, methyl cyclohexane diisocyanate, .dicyclohexyldimethyl methane 10 isocyanate, 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 3,8-bis(isocyanatomethyl)tricyclodecane, 3,9-bis(isocyanatomethyl)tricyclodecane, 4,8-bis(isocyanatomethyl)tricyclodecane, and 15 4,9-bis(isocyanatomethyl)tricyclodecane; aromatic polyisocyanate compounds such as diphenylsulfide-4,4'-diisocyanate; heterocyclic polyisocyanate compounds such as 2,5-diisocyanatothiophene, 2,5-bis(isocyanatomethyl)thiophene, 2,5-diisocyanatotetrahydrothiophene, 20 2,5-bis(isocyanatomethyl)tetrahydrothiophene, 3,4-bis(isocyanatomethyl)tetrahydrothiophene, 2,5-diisocyanato-1,4-dithiane, 2,5-bis(isocyanatomethyl)-1,4-dithiane, 4,5-diisocyanato-1,3-dithiolane, and 25 4,5-bis(isocyanatomethyl)-1,3-dithiolane; and the like. [0041] The polyol compound includes one or more kinds of aliphatic or ----------------------- 22 alicyclic alcohols. Specific examples thereof include linear or branched aliphatic alcohols, alicyclic alcohols, alcohols obtained by adding ethylene oxide, propylene oxide, or £-caprolactone to those alcohols, and the like. 5 [0042] Examples of the linear or branched aliphatic alcohols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 10 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 3-methyl-1,3-butanediol, 1,2-pentanediol, 1,3-pentanediol, 1,5-pentanediol, 2,4-pentanediol, 2-methyl-2,4-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, glycerol, diglycerol, polyglycerol, trimethylolpropane, pentaerythritol, 15 di(trimethylolpropane), and the like. [ 0043] Examples of the alicyclic alcohols include 1, 2-cyclopentanediol, 1,3-cyclopentanediol, 3-methyl-1,2-cyclopentanediol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, 1,4-cyclohexanediol, 20 4,4'-bicyclohexanol, 1,4-cyclohexanedimethanol, and the like. [0044] Furthermore, compounds obtained by adding ethylene oxide, propylene oxide, or £-caprolactone to the aforementioned alcohols may be used. Examples thereof include ethylene oxide adducts of 25 glycerol, ethylene oxide adducts of trimethylolpropane, ethylene oxide adducts of pentaerythritol, propylene oxide adducts of glycerol, propylene oxide adducts of trimethylolpropane, propylene oxide 5 23 adducts of pentaerythritol, caprolactone-modified glycerol, caprolactone-modified trimethylolpropane, caprolactone-modified pentaerythritol, and the like. [0045] Examples of the polythiol compound include aliphatic polythiol compounds such as methane dithiol, 1,2-ethanedithiol, 1,2,3-propanetrithiol, 1,2-cyclohexanedithiol, bis(2-mercaptoethyl)ether, tetrakis(mercaptomethyl)methane, diethylene glycol bis(2-mercaptoacetate), diethylene glycol 10 bis (3-mercaptopropionate), ethylene glycol bis (2-mercaptoacetate), ethylene glycol bis(3-mercaptopropionate), trimethylolpropane tris(2-mercaptoacetate), trimethylolpropane tris(3-mercaptopropionate), trimethylolethane tris(2-mercaptoacetate), trimethylolethane 15 tris(3-mercaptopropionate), pentaerythritol tetrakis(2-mercaptoacetate), pentaerythritol tetrakis(3-mercaptopropionate), bis(mercaptomethyl)sulfide, bis(mercaptomethyl)disulfide, bis(mercaptoethyl)sulfide, bis(mercaptoethyl)disulfide, bis(mercaptopropyl)sulfide, 2 0 bi s (mercaptomethy l thio) methane, bi s ( 2 -rnercaptoethy l thio) methane, bis(3-mercaptopropylthio)methane, 1,2-bis(mercaptomethylthio)ethane, 1,2-bis(2-mercaptoethylthio)ethane, 1,2-bis(3-mercaptopropylthio)ethane, 25 1,2,3-tris(mercaptornethylthio)propane, 1,2,3-tris(2-rnercaptoethylthio)propane, 1,2,3-tris(3-mercaptopropylthio)propane, l 24 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 5 tetrakis(mercaptomethylthiomethyl)methane, tetrakis(2-mercaptoethylthiomethyl)methane, tetrakis(3-mercaptopropylthiomethyl)methane, bis(2,3-dimercaptopropyl)sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 2,5-dimercapto-1,4-dithiane, 10 2,5-dimercaptomethyl-2,5-dimethyl-1,4-dithiane, esters of thioglycolic acids thereof and mercaptopropionic acids, hydroxymethyl sulfide bis(2-mercaptoacetate), hydroxymethyl sulfide bis(3-mercaptopropionate), hydroxyethyl sulfide bis(2-mercaptoacetate), hydroxyethyl sulfide 15 bis(3-mercaptopropionate), hydroxymethyl disulfide bis(2-mercaptoacetate), hydroxymethyl disulfide bis(3-mercaptopropionate), hydroxyethyl disulfide bis(2-mercaptoacetate), hydroxyethyl disulfide bis(3-mercaptopropionate), 2-mercaptoethyl ether 20 bis(2-mercaptoacetate), 2-mercaptoethyl ether bis(3-mercaptopropionate), thiodiglycolic acid bis(2-mercaptoethylester), thiodipropionic acid bis(2-mercaptoethylester), dithiodiglycolic acid bis(2-mercaptoethylester), dithiodipropionic acid 25 bis (2-mercaptoethylester), 1,1,3,3-tetrakis(mercaptomethylthio)propane, 1,1,2,2-tetrakis(mercaptomethylthio)ethane, 25 4,6-bis(mercaptomethylthio)-1,3-dithiane, tris(mercaptomethylthio)methane, and tris(mercaptoethylthio)methane; aromatic polythiol compounds such as 1,2-dimercaptobenzene, 1,3-dimercaptobenzene, 5 1,4-dimercaptobenzene, 1,2-bis(mercaptomethyl)benzene, 1,3-bis(mercaptomethyl)benzene, 1,4-bis(mercaptomethyl)benzene, 1,2-bis(mercaptoethyl)benzene, 1,3-bis(mercaptoethyl)benzene, 1,4-bis(mercaptoethyl)benzene, 1,3,5-trimercaptobenzene, 1,3,5-tris(mercaptomethyl)benzene, 10 1,3,5-tris(mercaptomethyleneoxy)benzene, 1,3,5-tris(mercaptoethyleneoxy)benzene, 2,5-toluenedithiol, 3,4-toluenedithiol, 1,5-naphtha1eneditihol, and 2,6-naphthaleneditihol; heterocyclic polythiol compounds such as 2-methylamino-4,6-dithiol-sym-triazine, 3,4-thiophenedithiol, 15 bismuthiol, 4,6-bis(mercpatomethylthio)-1,3-dithiane, and 2- (2, 2-bis (mercaptomethy1thio) ethyl) -1, 3-dithietane; and the like. [0046] In the present embodiment, when the polyurethane or polythiourethane are prepared, a polymerization catalyst may or may 20 not be used. Furthermore, optional additives such as an internal release agent and a bluing agent may be used. [0047] The polysulfide can be obtained by a method of performing ring-opening polymerization of a polyepithio compound or a 25 polythietane compound as the polymerizable compound (c), or can be obtained from a polyepithio compound and a polythiol compound. The composition for an optical material can contain the following l 26 polymerizable compound (c) constituting those resins. [0048] Examples of the polyepithio compound include epithioethylthio compounds such as bis(1,2-epithioethyl)sulfide, 5 bis(l,2-epithioethyl)disulfide, bis(epithioethylthio)methane, bis(epithioethylthio)benzene, bis[4-(epithioethylthio)phenyl]sulfide, and bis[4-(epithioethylthio)phenyl]methane; chain-like aliphatic 2,3-epithiopropylthio compounds such as 10 bis(2,3-epithiopropyl)sulfide, bis(2,3-epithiopropyl)disulfide, bis(2,3-epithiopropylthio)methane, 1,2-bis(2,3-epithiopropylthio)ethane, 1,2-bis(2,3-epithiopropylthio)propane, 1,3-bis(2,3-epithiopropylthio)propane, 15 1,3-bis(2,3-epithiopropylthio)-2-methylpropane, 1,4-bis(2,3-epithiopropylthio)butane, 1,4-bis(2,3-epithiopropylthio)-2-methylbutane, 1,3-bis(2,3-epithiopropylthio)butane, 1,5-bis(2,3-epithiopropylthio)pentane, 20 1,5-bis(2,3-epithiopropylthio)-2-methylpentane, 1,5-bis(2,3-epithiopropylthio)-3-thiapentane, 1,6-bis(2,3-epithiopropylthio)hexane, 1,6-bis(2,3-epithiopropylthio)-2-methylhexane, 1,8-bis(2,3-epithiopropylthio)-3,6-dithiaoctane, 25 1,2,3-tris(2,3-epithiopropylthio)propane, 2,2-bis(2,3-epithiopropylthio)-1,3-bis(2,3-epithiopropylthiometh yl)propane, -------------------------------------- 27 2,2-bis(2,3-epithiopropylthiomethyl)-1-(2,3-epithiopropylthio)bu tane, 1,5-bis(2,3-epithiopropylthio)-2-(2,3-epithiopropylthiomethyl)-3 -thiapentane, 5 1,5-bis(2,3-epithiopropylthio)-2,4-bis(2,3-epithiopropylthiometh yl)-3-thiapentane, 1-(2,3-epithiopropylthio)-2,2-bis(2,3-epithiopropylthiomethyl)-4 -thiahexane, 1,5,6-tris(2,3-epithiopropylthio)-4-(2,3-epithiopropylthiomethyl 10 )-3-thiahexane, 1,8-bis(2,3-epithiopropylthio)-4-(2,3-epithiopropylthiomethyl)-3 ,6-dithiaoctane, 1,8-bis(2,3-epithiopropylthio)-4,5-bis(2,3-epithiopropylthiometh yl)-3,6-dithiaoctane, 15 1,8-bis(2,3-epithiopropylthio)-4,4-bis(2,3-epithiopropylthiometh yl)-3,6-dithiaoctane, 1,8-bis(2,3-epithiopropylthio)-2,5-bis(2,3-epithiopropylthiometh yl)-3,6-dithiaoctane, 1,8-bis(2,3-epithiopropylthio)-2,4,5-tris(2,3-epithiopropylthiom 20 ethyl)-3,6-dithiaoctane, 1,1,1-tris[[2-(2,3-epithiopropylthio)ethyl]thiomethyl]-2-(2,3-ep ithiopropylthio)ethane, 1,1,2,2-tetrakis[[2-(2,3-epithiopropylthio)ethyl]thiomethyl]etha ne, 25 1,11-bis(2,3-epithiopropylthio)-4,8-bis(2,3-epithiopropylthiomet hyl)-3,6,9-trithiaundecane, 1,11-bis(2,3-epithiopropylthio)-4,7-bis(2,3-epithiopropylthiomet 28 hyl)-3,6,9-trithiaundecane, and 1,11-bis(2,3-epithiopropylthio)-5,7-bis(2,3-epithiopropylthiomet hyl)-3,6,9-trithiaundecane; cyclicaliphatic2,3-epithiopropylthio compounds such as l,3-bis(2,3-epithiopropylthio)cyclohexane, 5 l,4-bis(2,3-epithiopropylthio)cyclohexane, l,3-bis(2,3-epithiopropylthiomethyl)cyclohexane, 1,4-bis(2,3-epithiopropylthiomethyl)cyclohexane, 2,5-bis(2,3-epithiopropylthiomethyl)-1,4-dithiane, 2,5-bis[[2-(2,3-epithiopropylthio)ethyl]thiomethyl]-1,4-dithiane, 10 and 2,5-bis(2,3-epithiopropylthiomethyl)-2,5-dimethyl-1,4-dithiane; aromatic 2,3-epithiopropylthio compounds such as 1,2-bis(2,3-epithiopropylthio)benzene, 1,3-bis(2,3-epithiopropylthio)benzene, 15 1,4-bis(2,3-epithiopropylthio)benzene, 1,2-bis(2,3-epithiopropylthiomethyl)benzene, 1,3-bis(2,3-epithiopropylthiomethyl)benzene, 1,4-bis(2,3-epithiopropylthiomethyl)benzene, bis-[4-(2,3-epithiopropylthio)phenyl]methane, 20 2,2-bis[4-(2,3-epithiopropylthio)phenyl]propane, bis[4-(2,3-epithiopropylthio)phenyl]sulfide, bis[4-(2,3-epithiopropylthio)phenyl]sulfone, and 4,4'-bis(2,3-epithiopropylthio)biphenyl; chain-like aliphatic 2, 3-epithiopropyloxy compounds such as bis (2, 3-epi thiopropyl) ether, 25 bis (2, 3-epithiopropyloxy)methane, 1,2-bis(2,3-epithiopropyloxy)ethane, 1,2-bis(2,3-epithiopropyloxy)propane, 29 1,3-bis(2,3-epithiopropyloxy)propane, 1,3-bis(2,3-epithiopropyloxy)-2-methyl propane, 1,4-bis(2,3-epithiopropyloxy)butane, 1,4-bis(2,3-epithiopropyloxy)-2-methyl butane, 5 1,3-bis(2,3-epithiopropyloxy)butane, 1,5-bis(2,3-epithiopropyloxy)pentane, 1,5-bis(2,3-epithiopropyloxy)-2-methyl pentane, 1,5-bis(2,3-epithiopropyloxy)-3-thiapentane, 1,6-bis(2,3-epithiopropyloxy)hexane, 10 1,6-bis(2,3-epithiopropy1oxy)-2-methyl hexane, 1~8-bis(2,3-epithiopropyloxy)-3,6-dithiaoctane, 1,2,3-tris(2,3-epithiopropyloxy)propane, 2,2-bis(2,3-epithiopropyloxy)-1,3-bis(2,3-epithiopropyloxymethyl )propane, 15 2,2-bis(2,3-epithiopropyloxymethyl)-1-(2,3-epithiopropyloxy)buta ne, 1,5-bis(2,3-epithiopropyloxy)-2-(2,3-epithiopropyloxymethyl)-3-t hiapentane, 1,5-bis(2,3-epithiopropyloxy)-2,4-bis(2,3-epithiopropyloxymethyl 20 )-3-thiapentane, 1-(2,3-epithiopropyloxy)-2,2-bis(2,3-epithiopropyloxymethyl)-4-t hiahexane, 1,5,6-tris(2,3-epithiopropyloxy)-4-(2,3-epithiopropyloxymethyl)- 3-thiahexane, 25 1,8-bis(2,3-epithiopropyloxy)-4-(2,3-epithiopropyloxymethyl)-3,6 -dithiaoctane, 1,8-bis(2,3-epithiopropyloxy)-4,5-bis(2,3-epithiopropyloxymethyl 30 )-3,6-dithiaoctane, 1,8-bis(2,3-epithiopropyloxy)-4,4-bis(2,3-epithiopropyloxymethyl )-3,6-dithiaoctane, 1,8-bis(2,3-epithiopropyloxy)-2,5-bis(2,3-epithiopropyloxymethyl 5 )-3,6-dithiaoctane, 1,8-bis(2,3-epithiopropyloxy)-2,4,5-tris(2,3-epithiopropyloxymet hyl)-3,6-dithiaoctane, 1,1,1-tris[[2-(2,3-epithiopropyloxy)ethyl]thiomethy1]-2-(2,3-epi thiopropy1oxy)ethane, 10 1,1,2,2-tetrakis[[2-(2,3-epithiopropyloxy)ethy1]thiomethy1]ethan e, 1,11-bis(2,3-epithiopropyloxy)-4,8-bis(2,3-epithiopropyloxymethy 1)-3,6,9-trithiaundecane, 1,11-bis(2,3-epithiopropyloxy)-4,7-bis(2,3-epithiopropyloxymethy 15 1)-3,6,9-trithiaundecane, and 1,11-bis(2,3-epithiopropyloxy)-5,7-bis(2,3-epithiopropy1oxymethy 1)-3,6,9-trithiaundecane; cyclic aliphatic 2,3-epithiopropyloxy compounds such as 1,3-bis(2,3-epithiopropyloxy)cyclohexane, 1,4-bis(2,3-epithiopropyloxy)cyclohexane, 20 1,3~bis(2,3-epithiopropy1oxymethyl)cyclohexane, 1,4-bis(2,3-epithiopropyloxymethyl)cyclohexane, 2,5-bis(2,3-epithiopropyloxymethy1)-1,4-dithiane, 2,5-bis[[2-(2,3-epithiopropyloxy)ethyl]thiomethyl]-1,4-dithiane, and 25 2,5-bis(2,3-epithiopropyloxymethyl)-2,5-dimethyl-1,4-dithiane; aromatic 2,3-epithiopropyloxy compounds such as 1,2-bis(2,3-epithiopropyloxy)benzene, 31 1,3-bis(2,3-epithiopropyloxy)benzene, 1,4-bis(2,3-epithiopropyloxy)benzene, 1,2-bis(2,3-epithiopropyloxymethyl)benzene, 1,3-bis(2,3-epithiopropyloxymethyl)benzene, 5 1,4-bis(2,3-epithiopropyloxymethyl)benzene, bis[4-(2,3-epithiopropyloxy)phenyl]methane, 2,2-bis[4-(2,3-epithiopropyloxy)phenyl]propane, bis[4-(2,3-epithiopropyloxy)phenyl]sulfide, bis(4-(2,3-epithiopropyloxy)phenyl]sulfone, and 10 4,4'-bis(2,3-epithiopropyloxy)biphenyl; and the like. [0049] As the polythietane compound, metal-containing thietane compounds or non-metallic thietane compounds can be used. As disclosed in W02005-95490 or Japanese Unexamined Patent 15 Publication No. 2003-327583, these polythietane compounds contain one or more thietanyl groups in a molecule. Among the polythietane compounds, compounds having two or more thietanyl groups in total are preferable, and examples thereof include sulfide-based thietane compounds such as bisthietanyl sulfide, 20 bis(3-thietanylthio)disulfide, bis(3-thietanylthio)methane, and 3-( ((3'-thietanylthio)methylthio)methylthio)thietane; polysulfide~based thietane compounds such as bis(3-thietanyl)disulfide, bis(3-thietanyl)trisulfide, bis(3-thietanyl)tetrasulfide, and bis(3-thietanyl)pentasulfide; 25 and the like. [0050] The polymerizable compound (c) is preferably a combination of 32 a polyisocyanate compound and a polyol compound, a combination of a polyisocyanate compound and a polythiol compound, a polyepithio compound and/or a polythietane compound, or a combination of a polyepithio compound and a polythiol compound. 5 [0051] Next, the composition for an optical material of the present embodiment will be specifically described. The composition for an optical material of the present 10 embodiment contains one or more kinds of ultraviolet absorber (a) having a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm, and a resin for an optical material (b) or a polymerizable compound (resin monomer) (c). The amount of the ultraviolet absorber (a) contained in the 15 composition can be 0. 3% by weight to 2% by weight, preferably 0. 3% by weight to 1.5% by weight, and more preferably 0.3% by weight to 1.2% by weight, with respect to the total weight of the resin for an optical material (b) or the polymerizable compound (c). 20 [0052] When the composition for an optical material containing the ultraviolet absorber (a), Hhich have a maximum absorption peak within a predetermined rang, in an amount within the aforementioned range is used, it is possible to obtain an optical material satisfying the aforementioned characteristics (1) to (3) of light transmittance at 25 a specific 1-1avelength. The optical material obtained from the composition for an optical material of the present embodiment has excellent transparency, 33 is inhibited from being colored, and can prevent injury including eyefatigueorstress. Particularly, because the light transmittance thereof at 440 nm is equal to or greater than 80%, the optical material can be obtained in the form of a colorless and transparent optical 5 material having excellent external appearance. [0053] The composition for an optical material of the present embodiment may further contain an internal release agent, a resin-modifying agent, a light stabilizer, a bluing agent, and the 10 like as other components. Moreover, the composition for an optical material can contain knm-m ultraviolet absorbers having a maximum absorption peak that is not within a range of equal to or greater than 350 nm and equal to or less than 370 nm, in addition to the ultraviolet absorber (a) . 15 [0054] (Other components) (Internal release agent) As the internal release agent, acidic phosphoric acid esters can be used. Examples of the acidic phosphoric acid esters include 20 a phosphoric acid monoester and a phosphoric acid diester. One kind thereof can be used singly, or two or more kinds thereof can be used by being mixed with each other. E'or example, it is possible to use ZelecUN manufactured by Stepan Company, internal release agents for MR manufactured by Mitsui 25 Chemicals, Inc., a JP series manufactured by JOHOKU CHEMICAL CO., LTD., a Phosphanol series manufactured by TOHO Chemical Industry Co., Ltd., an AP or DP series manufactured by DAIHACHI CHEMICAL INDUSTRY CO., LTD., and the like. [0055] (Resin-modifying agent) 34 Furthermore, in order to adjust various properties of the 5 obtained resin, such as optical properties, impact resistance, and specific gravity, and to adjust viscosity or pot life of the composition, a resin-modifying agent can be added to the polymerizable composition of the present invention, l·lithin a range that does not diminish the effects of the present invention. 10 15 Examples of the resin-modifying agent include olefin compounds and the like including episulfide compounds, alcohol compounds, amine compounds, epoxy compounds, organic acids and anhydrides thereof, and (meth)acrylate compounds. [0056] (Light stabilizer) As the light stabilizer, hindered amine-based compounds can be used. Examples of commercially available products of the hindered amine compounds include LoNilite76 and Lowilite92 manufactured by Chemtura Corporation, Tinuvin144, Tinuvin292, and Tinuvin765 20 manufactured by BASF Corporation, Adeka Stab LA-52 and LA-72 25 manufactured by ADEKA CORPORATION, JF-95 manufactured by JOHOKU CHEMICAL CO., LTD., and the like. [0057] (Bluing agent) Examples of the bluing agent include substances that have an absorption band in a Navelength range from orange to yelloN Nithin a visible light region and functions to adjust the color of an optical 35 material formed of a resin. More specifically, the bluing agent contains substances that are blue and violet in color. [0058] The composition for an optical material can be obtained by mixing 5 the aforementioned components together by a predetermined method. The respective components in the composition can be mixed in known order by a known method without particular limitation, as long as the components can be uniformly mixed together. Examples of the known method include a method of preparing a master batch containing 10 additives in a predetermined amount and dispersing and dissolving the master batch in a solvent, and the like. For example, in the case of the polyurethane resin, a method of preparing a master batch by dispersing and dissolving additives in the polyisocyanate compound, and the like can be used. 15 In the present embodiment, in order to obtain a polyurethane and polythiourethane, a polymerization catalyst may or may not be used. [0059] Specifically, the optical material of the present embodiment 20 can be obtained by a method of curing the composition for an optical material containing the ultraviolet absorber (a) and the resin for an optical material (b) or by a method of mixing the composition for an optical material containing the ultraviolet absorber (a) and the polymerizable compound (c) and then polymerizing the composition. 25 [0060] Next, the use of the optical material of the present embodiment l 36 will be described. The present embodiment is characterized in that it found that the optical material cuts the light having a wavelength of 400 nm to 420 nm, has a high degree of transparency, and is balanced well 5 in terms of properties by containing a specific ultraviolet absorber (a) in the optical material. [0061] Moreover, the present embodiment is characterized in that it found that because the optical material cuts the light having a 10 wavelength of 400 nm to 420 nm, the optical material further reduces the likelihood of injury including eye fatigue and stress. [ 00 62] The optical material can be used for, for example, various ' plastic lenses such as plastic spectacle lenses, goggles, spectacle 15 lenses for vision correction, lenses for imaging apparatus, Fresnel lenses for liquid crystal projector, lenticular lenses, and contact lenses, sealants for light emitting diode (LED), optical waveguides, optical adhesives used for bonding of optical lenses or optical waveguides, antireflection films used for optical lenses and the like, 20 transparent coating used for members (a substrate, a light guide plate, a film, a sheet, and the like) of liquid crystal display devices, sheets or films stuck to the front glass of cars or to helmet for motorcycles, transparent substrates, and the like. [0063] 25 When the optical material has a thickness of 2 mm, the light transmittance thereof at a wavelength of 440 nm is equal to or greater than 80% and preferably equal to or greater than 85%; the light 37 transmittance thereof at a wavelength of 420 nm is equal to or less than 70% and preferably equal to or less than 50%; and the light transmittance thereof at a wavelength of 410 nm is equal to or less than 10% and preferably equal to or less than 5%. When the light 5 transmittance is within the above range, the optical material exerts a strong effect of blocking from harmful ultraviolet rays to blue light of about 420 nm, and has excellent external appearance that is colorless and transparent. Moreover, when the light transmittance at 440 nm is equal to or greater than 80%, a colorless and transparent 10 molded product (optical material) having excellent external appearance can be obtained. Herein, the ranges of the numerical values can be arbitrarily combined. [0064] Typical examples of the optical material of the present 15 embodiment include an optical material constituted with a lens substrate, an optical material constituted Hith a lens substrate and a film layer, an optical material constituted Hith a lens substrate and a coating layer, and an optical material constituted \vi th a lens substrate, a film layer, and a coating layer. The ultraviolet 20 absorber (a) ·can be contained in any one of the lens substrate, the film layer, and the coating layer. [ 0065] Specific examples of the optical material of the present embodiment include an optical material constituted only with the lens 25 substrate; an optical material in Hhich a film layer is laminated over at least one surface of the lens substrate; an optical material in Hhich a coating layer is laminated over at least one surface of ! 38 the lens substrate; an optical material in which the film layer and the coating layer are laminated over at least one surface of the lens substrate; an optical material in which the film layer is interposed between h1o lens substrates; and the like. 5 [0066] The optical material of the present embodiment has the aforementioned characteristics (1) to (3) as a whole, and can be manufactured in the following manner. Herein, the ultraviolet absorber (a) contained in the optical material may include one or 10 more kinds of compounds satisfying the aforementioned conditions. Moreover, known ultraviolet absorbers other than the ultraviolet absorber (a) can be further contained in the lens substrate, the film layer, or the coating layer. The optical material of the present embodiment can contain a 15 resin obtained from the resin for an optical material (b) or the polymerizable compound (c), and can use the aforementioned transparent resin. [0067] For example, a molded product (a lens substrate or an optical 20 film) can be prepared by using the composition for an optical material containing the ultraviolet absorber (a), and by using the molded' product, the optical material can be prepared. [ 00 68] The optical material of the present embodiment can be suitably 25 used as a plastic lens such as a plastic spectacle lens. Hereinafter, the optical material of the present embodiment in the form of a plastic lens will be described. l 39 [ 00 69] For example, the plastic lens of the present embodiment is constituted as below. Plastic lens A: a plastic lens including a lens substrate formed 5 of the composition for an optical material of the present embodiment Plastic lens B: a plastic lens including a film or layer formed of the composition for an optical material of the present embodiment, over at least one surface of a lens substrate (the lens substrate may be obtained from the composition for an optical material of the 10 present embodiment.) Plastic lens C: a plastic lens in which a lens substrate (the lens substrate may be obtained from the composition for an optical material of the present embodiment) is laminated over both surfaces of a film formed of the composition for an optical material of the 15 present embodiment The plastic lenses constituted as above are designed such that they satisfy the characteristics (1) to (3) of the present invention. The optical material can be suitably used for plastic spectacle lenses. 20 [0070] (Plastic lens A) The method for manufacturing the plastic lens A including a lens substrate formed of the composition for an optical material is not particularly limited. Hmvever, examples of preferable 25 manufacturing methods thereof include cast polymerization using a mold for casting a lens. The lens substrate can be constituted 1vith polyurethane, polythiourethane, polysulfide, poly(meth)acrylate, 40 or the like, and can be obtained by using the composition for an optical material containing the ultraviolet absorber (a) and the polymerizable compound (c) (a resin monomer for optical material) which is for obtaining the those resins. 5 [0071] Specifically, the composition for an optical material is injected into the cavity of a molding mold held by a gasket, tape, or the like. At this time, depending on the physical properties required to the plastic lens to be obtained, it is preferable to 10 optionally perform a degassing treatment under reduced pressure, a filtration treatment under increased or reduced pressure, and the like in many cases. [0072] After the composition is injected, the mold for casting a lens 15 is heated in a heatable device in an oven or in water according to a predetermined temperature program, such that the composition is cured and molded. If necessary, the resin-molded product may be subjected to a treatment such as annealing. 20 25 [0073] In the present embodiment, in molding a resin, in addition to the aforementioned "other components", various additives such as a chain extender, a crosslinking agent, an antioxidant, an oil-soluble dye, a filler, and adhesiveness-improving agent can be added according to the purpose, similarly to the known molding methods. Furthermore, the plastic lens A of the present embodiment may include various coating layers over the lens substrate formed of the composition for an optical material, according to the purpose or use =:}I ~I 41 thereof. As the coating layer, it is possible to use a coating layer which is prepared by using a coating material (composition) containing the ultraviolet absorber (a) or a coating layer which is prepared by using 5 a coating material not containing the ultraviolet absorber (a). Moreover, the plastic lens A can be prepared in a manner in 1vhich the coating layer is formed; and then the plastic lens including the coating layer is dipped in a dispersion, lvhich is obtained by dispersing the ultraviolet absorber (a) in \vater or a solvent, such 10 that the coating layer is impregnated 1vith the ultraviolet absorber (a) . [0074] (Plastic lens B) The plastic lens B of the present embodiment includes a film 15 or layer formed of the composition for an optical material, over at least one surface of the lens substrate. The lens substrate is formed of the composition for an optical material of the present embodiment. The obtained plastic lens is designed such that it satisfies the characteristics (1) to (3) of the present invention. 20 Examples of manufacturing methods of the plastic lens B include (1) a method in which a lens substrate is manufactured, and then a film or sheet. formed of the composition for an optical material is stuck over at least one surface of the lens substrate; (2) a method in which a film or sheet composed of the composition for an optical 25 material is disposed along the inner wall at one side of the cavity of a molding mold which is held by a gasket or tape as described later, then a polymerizable composition is injected into the cavity, and 42 the composition is cured; and the like. [0075] The film or sheet formed of the composition for an optical material that is used in the method (1) is not particularly limited. 5 Howeve~, the film or sheet can be obtained by using pellets of the composition for an optical material obtained by melt kneading, impregnation, or the like, by various methods known in the related art. Specific examples of the various methods known in the related art include molding methods such as an injection molding method, a 10 profile extrusion molding method, a pipe molding method, a tube molding method, a coating molding method for different types of molded products, an injection blow molding method, a direct blow molding method, aT-die sheet or film molding method, an inflation film molding method, and a press molding method. The obtained film or sheet 15 contains a polycarbonate, a polyolefin, and the like. The lens substrate can be obtained from known optical resins, and examples of the optical resins include a· (thio) urethane, a polysulfide, and the like. The film or sheet formed of the composition for an optical 20 material can be stuck over the surface of the lens substrate by a known method. [0076] The cast polymerization in the method (2) can be performed in the same manner as the method used for the plastic lens A. Examples 25 of compositions used in the cast polymerization include compositions containing polymerizable compounds (the compositions may contain the ultraviolet absorber (a)). l ' 43 · Furthermore, the plastic lens B of the present embodiment may include various coating layers over the lens substrate or over a "film or layer" formed of the composition for an optical material, according to the purpose or use thereof. Similarly to the plastic lens A, the 5 plastic lens B can contain the ultraviolet absorber (a) in the coating layers. [0077] (Plastic lens C) In the plastic lens C of the present embodiment, a lens substrate 10 (the lens substrate may be obtained from the composition for an optical material of the present embodiment) is laminated over both surfaces of a film formed of the composition for an optical material. The obtained plastic lens is designed such that it satisfies the characteristics (1) to (3) of the present invention. 15 Examples of manufacturing methods of the plastic lens C include (1) a method in \·lhich a lens substrate is manufactured, and then the lens substrate is stuck over both surfaces of a film or sheet formed of the composition for an optical material; (2) a method in which a film or sheet formed of the composition for an optical material 20 is disposed in the cavity of a molding mold held by a gasket, Lape, or the like in a state of being separated from both of the inner wall of the mold, then a polymerizable composition is injected into the cavity, and the composition is cured; and the like. [0078] 25 As the film or sheet formed of the composition for an optical material and the lens substrate that are used in the method (1), it is possible to use the same film or sheet and the same lens substrate 5 44 as used in the method (1) used for the plastic lens B. The film or sheet formed of the composition for an optical material can be stuck over the surface of the lens substrate by a known method. [0079] Specifically, the method (2) can be performed as below. In the space of a mold for casting a lens that is used in the manufacturing method of the plastic lens A, the film or sheet formed of the composition for an optical material is disposed, such that both surfaces of the film or sheet becomes parallel to the inner 10 surface of the mold at the front side facing the film or sheet. Thereafter, in the space of the mold for casting a lens, the composition containing the polymerizable compound (the composition may contain the ultraviolet absorber (a)) is injected into ti-m spaces portions between the mold and a polarizing film by a predetermined 15 injection device. [0080] Subsequently, after the composition is injected, the mold for casting a lens is heated in a heatable device in an oven or in water according to a predetermined temperature program, such that the 20 composition is cured and molded. If necessary, the resin-molded product may be subjected to a treatment such as annealing. Furthermore, the plastic lens C of the present embodiment may include various coating layers over the lens substrate, according to the purpose or use thereof. Similarly to the plastic lens A, the 25 plastic lens C can contain the ultraviolet absorber (a) in the coating layers. [0081] 45 In the present embodiment, from the viewpoint of manufacturing an optical material, which has a light transmittance satisfying the aforementioned characteristics ( 1) to ( 3) when being in the form of an optical material having a thickness of 2 mm, with excellent 5 controllability, it is preferable to use a lens substrate obtained from the composition for an optical material of the present embodiment. 10 [0082] [Plastic spectacle lens] A plastic spectacle lens can be obtained by using the plastic lens of the present embodiment. Herein, a coating layer may be optionally provided over either or both of the surfaces of the lens. [0083] Specific examples of the coating layer include a primer layer, 15 a hard coat layer, an antireflection layer, an anti fogging coat layer, an antifouling layer, a water repellent layer, and the like. These coating layers may be used singly, or a plurality of coating layers may be used in the form of a multilayer. When the coating layer is provided over both surfaces of the lens, each of the surfaces may 20 be provided 1-1ith the same coating layer or with different coating layers. [0084] For each of the coating layers, known ultraviolet absorbers other than the ultraviolet absorber (a), an infrared absorber for 25 protecting the eye from infrared rays, a light stabilizer or an antioxidant for improving weather resistance of the lens, a dye or a pigment for making the lens more fashionable, a photochromic dye 46 or a photochromic pigment, an antistatic agent, and other known additives for improving performance of the lens can be concurrently used. For a layer subjected to coating, various. leveling agents for improving coating properties may be used. 5 [0085] Generally, the primer layer is formed between the hard coat layer, which will be described later, and the lens. The primer layer is a coating layer for improving adhesiveness betHeen the lens and the hard coat layer which is formed over the primer layer, and can also 10 improve impact resistance in some cases. For the primer layer, any material can be used as long as it exhibits a high degree of adhesiveness with respect to the obtained lens. However, generally, a urethane-based resin, an epoxy-based resin, a polyester-based resin, a melamine-based resin, a primer composition containing polyvinyl 15 acetal as a main component, or the like is used. For the primer composition, an appropriate solvent not exerting an influence on the lens may be used so as to adjust viscosity of the composition. Needless to say, the composition not containing a solvent may be used. 20 [0086] The primer layer can be formed by any method including a coating method and a dry method. When the coating method is used, the lens is coated v1ith the primer composition by a known coating method such as spin coating or dip coating, and then the composition is solidified to form a primer layer. When the dry method is used, the primer layer 25 is formed by a known dry method such as a CVD method or a vacuum deposition method. In forming the primer layer, in order to improve adhesiveness, the surface of lens may be optionally subjected to a 47 pre-treatment such as an alkali treatment, a plasma treatment, or an ultraviolet treatment. The hard coat layer is a coating layer for providing functions, such as scratch resistance, abrasion resistance, moisture resistance, 5 resistance to hot water, heat resistance, and weather resistance, to the lens surface. [0087] Generally, for the hard coat layer, a hard coat composition is used which contains a curable organic silicon compound and one or 10 more kinds of fine particles of an oxide of an element selected from the group of elements including Si, Al, Sn, Sb, Ta, Ce, La, Fe, Zn, W, Zr, In, and Ti and/ or one or more kinds of fine particles constituted with a composite oxide of two or more elements selected from the group of elements. 15 [0088] The hard coat composition preferably contains at least one of amines, amino acids, metal acetyl acetonate complexes, organic acid metal salts, perchloric acids, salts of perchloric acids, acids, metal chlorides, and polyfunctional epoxy compounds, in addition to 20 the aforementioned components. For the hard coat composition, an appropriate solvent that does not exert an influence on the lens may be used, and the composition not containing a solvent may be used. [0089] Generally, the lens is coated with the hard coat composition 25 by a knmm coating method such as spin coating or dip coating, and then the composition is cured, 1·1hereby the hard coat layer is formed. Examples of curing methods include thermal curing, curing methods l 48 performed by irradiation of energy rays such as ultraviolet rays or visible rays, and the like. In order to inhibit formation of interference fringes, a difference between the refractive index of the hard coat layer and the refractive index of the lens is preferably 5 within a range of ±0 .1. [0090] Generally, the antireflection layer is optionally formed over the hard coat layer. The antireflection layer is classified into an inorganic antireflection layer and an organic antireflection layer. 10 The inorganic antireflection layer is formed of an inorganic oxide such as Si02 or Ti02 by a dry method such as a vacuum deposition method, a sputtering method, an ion plating method, an ion beam-assisted method, and a CVD method. The organic antireflection layer is formed of a composition, 1vhich contains an organic silicon compound and fine 15 silica-based particles having internal cavities, by a wet method. [ 0091] The antireflection layer is composed of a single layer or multiple layers. When it is used in the form of a single layer, a value obtained by subtracting the refractive index of the 20 antireflection layer from the refractive index of the hard coat layer is preferably at least equal to or greater than 0.1. In order to cause the antireflection layer to effectively perform an antireflection function, it is preferable to constitute the antireflection film with multiple films, and in this case, a film 25 with a l01v refractive index and a film with a high refractive index are alternately laminated on each other. Even in this case, a difference in refractive index between the film 1vith a low refractive l 49 index and the film with a high refractive index is preferably equal to or greater than 0.1. Examples of the film with a high refractive index include films of ZnO, Ti02 , Ce02 , Sb205 , Sn02 , Zr02 , Ta20 5 , and the like, and examples of the film with a low refractive index include 5 films of Si02 and the like. [ 00 92] If necessary, an antifogging layer, an antifouling layer, or a water repellent layer may be formed over the antireflection film layer. Regarding the method for forming the antifogging layer, the 10 antifouling layer 1 and the 1·1ater repellent layer, the method, material, and the like used for treating these layers are not particularly limited as long as they do not exert a negative influence on the antireflection function. It is possible to use knmm methods and materials used for an antifogging treatment, an antifouling 15 treatment, and a water repellency treatment. Examples of the methods used for the antifogging treatment and the antifouling treatment include a method of covering the surface with a surfactant; a method of giving water absorbing properties to the layer by adding a hydrophilic film to the surface of the layer; a method of improving 20 the water absorbing properties by forming fine concavities and convexities over the surface of the layer; a method of giving water absorbing properties to the layer by utilizing photocatalytic activity; a method performing a super water repellency treatment over the layer to prevent water drops from adhering to the layer; and the 25 like. Examples of the methods used for the water repellency treatment include a method of forming a layer having undergone the \·later repellency treatment comprised of a fluorine-containing silane 50 compound or the like by vapor deposition or sputtering; a method of dissolving a fluorine-containing silane compound in a solvent and then coating a layer with the solution so as to form a layer having undergone the >vater repellency treatment; and the like. 5 [0093] [Second embodiment] In the present embodiment, an optical material can be prepared by using a composition for an optical material not containing the ultraviolet absorber (a). Herein, the composition for an optical 10 material can contain the same components as described in the first embodiment except for the ultraviolet ~bsorber (a), and can be constituted in the same manner as in the first embodiment. The present embodiment will be described below. In the following description, description of the points common to the first and the 15 second embodiments will not be repeated. [0094] The optical material of the present embodiment can be suitably used as a plastic spectacle lens, and includes a lens substrate, and a film layer and a coating layer that are optionally laminated over 20 the lens substrate. [0095] The manufacturing method of the plastic spectacle lens of the present embodiment can include the following steps. Step a: preparing a lens substrate containing a resin (a resin 25 for an optical material or a resin obtained from a polymerizable compound) Step b: impregnating the obtained lens substrate with 51 ultraviolet absorber (a) [0096] The composition for an optical material used in Step a is the same as the composition for an optical material described in the first 5 embodiment, except that the composition does not contain the ultraviolet absorber (a) . In Step a, a lens substrate (molded product) can be obtained in the same manner as in the first embodiment. In Step b, the obtained lens substrate is dipped in a dispersion, which is obtained by dispersing the ultraviolet absorber (a) in water 10 or in a solvent, such that the lens substrate is impregnated with the ultraviolet absorbers, and then the lens substrate is dried. [0097] The amount of the ultraviolet absorber (a) used for impregnation can be controlled to be an intended amount according to the 15 concentration of the ultraviolet absorbers in the dispersion, the temperature of the dispersion, and time taken for dipping the lens substrate. The higher the concentration and the temperature, and the longer the dipping time, the larger the amount of the ultraviolet absorbers used for impregnation. When it is required to accurately 20 control the amount of the ultraviolet absorbers used for impregnation, under a condition in 1vhich amount of the ultraviolet absorbers used for impregnation set to be small, the lens substrate is repeatedly dipped in the dispersion plural times. 25 [0098] In the present embodiment, the manufacturing method can further include a step of forming a coating layer over at least one surface of the lens substrate impregnated with the ultraviolet absorber (a) . 5 10 15 20 52 Specifically, by using a coating material (a composition for an optical material) containing the ultraviolet absorber (a), a coating layer containing the ultraviolet absorber (a) can be formed over an optical material such as a plastic lens. Moreover, the manufacturing method can include a step of laminating the lens substrate impregnated with the ultraviolet absorber (a) over at least one surface of a film, preferably, over both surfaces of a film. [0099] In the second embodiment, the optical material obtained by the manufacturing method includes the lens substrate, and the film layer and the coating layer that are optionally laminated over the lens substrate. [0100] Up to now, the present invention has been described by using embodiments. However, the present invention is not limited to the embodiments, and various embodiments can be adopted as long as the effects of the invention of the present application are not diminished. EXAMPLE [0101] Hereinafter, the present invention will be more specifically described by using examples, but the present invention is not limited 25 to the examples. The materials and evaluation methods used in the examples of the present invention are as follows. [0102] 53 [Method for measuring light transmittance] By using a Shimadzu Spectrophotometer UV-1600 manufactured by Shimadzu Corporation as a measurement instrument and using a Plano lens having a thickness of 2 mm, an ultraviolet-visible light spectrum 5 1·1as measured. 10 [Method for measuring Y.I value] Y. I value was measured by using a flat plate having a thickness of 2 mm and a chromameter CR-200 manufactured by Konica Minolta, Inc. [Measurement of refractive index and Abbe number] Refractive index and Abbe number were measured at 20°C by using a Pulfrich refractometer KPR-30 manufactured by Shimadzu Corporation. [Measurement of glass transition temperature (Tg)] A glass transition temperature was measured by a TMA penetration 15 method (load: 50 g; pin tip: 0.5 mm.~1 I 70 Table 1 (continued) Composition for optical material Optical material (a)/( c) X Ultraviolet Resin 100 Bluing 410 nm 420 nm 440 nm Note absorber (a) monomer (% by agent Transmittance(%) Transmittance(%) Transmittance(%) transparency Coloring Y.l (c) weiohtl Comparative Not completely example 1 a1 c1,c2,c3 2.5 - - - - .. - - dissolved in monomer liquid Comparative exam ole 2 a2 c1 ,c2,c3 1.5 - 61.8 84.8 89.1 Transparent AA - Comparative example 3 I a2 c1 ,c2,c3 10.0 - 0.4 1.4 2.4 White turbidity c - Cloudy Comparative example 4 I a3 c1,c2,c3 0.03 - 10.2 28.2 77.9 Transparent c - Comparative example 5 a4 c1 ,c2,c3 1.5 - 13.7 66.4 89.3 Transparent AA - Comparative example 6 a4 c3,c4 2.0 - - - - White turbidity c - White turbidity Comparative example 7 a4 c3,c4 0.6 - 23.3 69.9 87.2 Transparent AA - --·- 71 [ 012 6] The ultraviolet absorber (a), the polymerizable compound (c), and the bluing agent shown in Table 1 are as follows. al: 5 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-chlorobenzotriazole a2: 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole a3: TINUVIN Carboprotect a4: 2-(3,5-di-t-amyl-2-hydroxyphenyl)-benzotriazole cl: mixture of 10 2,5-bis(isocyanatomethyl)-bicyclo[2,2,l]heptane and 2,6-bis(isocyanatomethyl)-bicyclo[2,2,1]heptane c2: pentaerythritol tetrakis(3-mercaptopropionate) c3: 1,2-bis[(2-mercaptoethyl)thio]-3-mercaptopropane c4: m-xylylene diisocyanate 15 c5: mixture containing 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane as main components 20 c6: isophorone diisocyanate c7: hexamethylene diisocyanate c8: tolylene diisocyanate c9: trimethylolpropane propoxylate clO: bis(2,3-epithiopropyl)disulfide 25 ell: dicyclohexylmethane-4,4'-diisocyanate dl: PlastBlue8514 d2: PlastRed8320 72 [0127] Table 2 Evaluator A B c D E Example 1 A A B A A Example 2 A A A A A Example 3 A A A A A Comparative B B c B B example 2 Comparative c c c c c example 3 Comparative B c B c c example 4 [0128] As is evident from the above results obtained from examples and 5 comparative examples, Hhen the evaluators wore the lenses obtained in Comparative examples 2 to 4, they felt no change in eye fatigue or felt eye fatigue. In contrast, v1hen the evaluators wore lenses obtained in Examples 1 to 3, they did not feel eye fatigue. Furthermore, the sample spectacles prepared in examples 10 satisfied the characteristics (1) to (3) of light transmittance. Consequentially, the sample spectacles did not make the evaluators feel eye fatigue and had excellent transparency and external appearance. In addition, by the comparison between Example 3 and Comparative example 2, it Has found that even when the amount of the 15 ultraviolet absorber used is the same as the total Height of the polymerizable compound, when the ultraviolet absorber having a maximum absorption peak out of the range of the present invention is used, the light transmittance at a wavelength of 410 nm becomes greatly different from the light transmittance at a wavelength of 20 420 nm, and the ultraviolet absorber (a) used in the present invention 73 is effective. [0129) The present application claims priorities based on Japanese Patent Application No. 2013-036694 filed on February 27, 2013 and 5 Japanese Patent Application No. 2013-258501 filed on December 13, 2013, and the entire product of which is incorporated herein. [0130) The present invention also includes the follmving embodiments. [1] An optical material containing one or more kinds of 10 ultraviolet absorber (a) having a maximum absorption peak Hithin a range of equal to or greater than 350 nm and• equal to or less than 370 nm, in which a light transmittance of the optical material having a thickness of 2 mm satisfies the following characteristics (1) to ( 3) ' 15 (1) a light transmittance at a wavelength of 410 nm is eq.ual to or less than 10%, ( 2) a light transmittance at a wavelength of 420 nm is equal to or less than 70%, and (3) a light transmittance at a wavelength of 440 nm is equal 20 to or greater than 80%. [2] The optical material described in [1], in which the ultraviolet .. absorber (a) is one or more kinds of compound selected from benzotriazole-based compounds. [3] The optical material described in [1) or [2], in which the 25 ultraviolet absorber (a) is 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-chlorobenzotriazole. [4] The optical material described in any one of [1) to [3), l 74 that contains at least one kind selected from polyurethane, polythiourethane, polysulfide, polycarbonate, poly(meth)acrylate, and polyolefin. [5] The optical material described in any one of [1] to [4], 5 including a lens substrate, and a film layer and a coating layer which are optionally laminated over the lens substrate. [6] A composition for an optical material comprising an ultraviolet absorber including one or more kinds of ultraviolet absorbers (a) having a maximum absorption peak within a range of equal 10 to or greater than 350 nm and equal to or less than 370 nm, and a resin for an optical material (b) or a resin monomer (c), in which the amount of the ultraviolet absorber (a) contained in the composition is 0.3% by weight to 2% by weight 1vith respect to the total 1-1eight of the resin for an optical material (b) or the resin 15 monomer (c). [7] The composition for an optical material described in [6], in which the ultraviolet absorber (a) is one or more kinds of compound selected from benzotriazole-based compounds. [8] The composition for an optical material described in [6] 20 or [ 7], in which the resin for an optical material (b) is at least one kind selected from polycarbonate, poly(meth)acrylate, and polyolefin. [9] The composition for an optical material described in any one of [6] to [8], in which the resin monomer (c) is a combination 25 of a polyisocyanate compound and a polyol compound, a combination of a polyisocyanate compound and a polythiol compound, or a combination of a polyepithio compound and a polythiol compound. l ------------------------- 75 [10] A manufacturing method of a molded product, comprising a step of obtaining the composition for an optical material described in any one of [6] to [9] by mixing the ultraviolet absorber (a) with the resin for an optical material (b) or the resin monomer (c), and 5 a step of curing the composition for an optical material. 10 15 [11] A molded product obtained by molding the composition for an optical material described in any one of [6] to [9]. [12] An optical material comprised of the molded product described in [11]. [ 13] A plastic spectacle lens comprised of the optical material described in any one of [1] to [5] and [12]. [14] A plastic spectacle lens comprising a lens substrate obtained from the composition for an optical material described in any one of [6] to [9]. [ 15] A film comprised of the molded product described in [ 11] . [16] A coating material comprised of the molded product described in [11]. [17] A plastic spectacle lens comprising a film layer over at least one surface of a lens substrate, in which the film layer is 20 comprised of a film described in [15]. [18] A plastic spectacle lens comprising a coating layer over at least one surface of a lens substrate, in which the coating layer is comprised of the coating material described in [16]. CLAIMS 1. An optical material containing one or more kinds of ultraviolet absorber (a) having a maximum absorption peak 1vi thin a range of equal 5 to or greater than 350 nm and equal to or less than 370 nm, wherein a light transmittance of the optical material having a thickness of 2 mm satisfies the follm·ling characteristics (1) to 10 15 ( 3) ' (1) a light transmittance at a wavelength of 410 nm is equal to or less than 10%, ( 2) a light transmittance at a wavelength of 420 nm is equal to or less than 70%, and ( 3) a light transmittance at a ~