JP2000298249A - Eyeglass lens for color vision correction - Google Patents

Abstract

(57) [Problem] To provide an inexpensive, high-performance color vision correcting spectacle lens made of plastic having a low-cost, high-performance color vision correction spectral characteristic curve for a person with color vision deficiency, who can understand the absolute color sensation. SOLUTION: A color vision correcting spectrum characteristic curve is formed by a colorant or a colorant and a partially reflecting film of light, and a part provided with the color vision correcting spectrum characteristic curve by giving a concentration gradient to the color vision correcting spectral characteristic. By combining with the naked eye or a part with a weak correction effect,
It is possible to identify colors more widely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle lens for correcting color vision, which can provide a person with color blindness and color vision impairment who has color blindness to have a normal color vision discrimination ability.

[0002]

2. Description of the Related Art Color blindness includes inborn color blindness and acquired color blindness. Acquired color blindness is caused by diseases of the eyes and brain, and other disorders such as reduced visual acuity may appear strongly. Many. Congenital color vision deficiency is due to heredity, usually referred to as color blindness, and no effective treatment method has yet been found.

[0003] There are two types of human visual cells, rod photoreceptors and cone photoreceptors. Rod photoreceptors only have a sensation of brightness and darkness, and cone photoreceptors have a visual sense. It functions to sense the three rays necessary to create all color sensations. There are three types of cone photoreceptors, which are called red cone photoreceptor, green cone photoreceptor, and blue cone photoreceptor, respectively, from the long wavelength side. These three types of photoreceptors receive respective stimuli, and are perceived as a specific color by a combination of the stimulus intensities.

[0004] The so-called color vision deficiency occurs because any of these three types of photoreceptor cells is defective or missing. If the red cone photoreceptor cell is impaired, the first color vision disorder is impaired, if the green cone photoreceptor cell is impaired, the second color vision impairment is detected. Call. Third color vision deficiency is extremely rare and rarely causes clinical problems.

[0005] With respect to the method of correcting this color vision abnormality, Japanese Patent Application Laid-Open Nos. 47-25990, 59-148027, U.S. Pat.
No. 5,369,453. JP-A-47-2
Since no effective spectral characteristics for correction are shown in Japanese Patent No. 5990, unless an absorption band in the dark field is given, it is particularly difficult for complementary colors having long wavelengths to reach the optic nerve, and it is difficult to recognize colors. Also, Japanese Unexamined Patent Publication No. Sho 59-148027
No. 4,300,819, a part of a lens is colored, and the object is corrected by using the movement of an eye to see an object and an afterimage. U.S. Pat. No. 3,877,797 uses an optical filter to modify and correct the spectrum emitted by a light-emitting or reflecting object before reaching the eye.

According to US Pat. No. 5,369,453, as a result of performing a computer inspection on 300 cases of color vision deficiency, the majority of color blind patients can recognize the three primary colors of red, green, and blue with trichromatic color vision. Suppose that the ability to discriminate against colors within a certain wavelength range is only very poor,
It is stated that color blindness can be corrected by converting the stimulus value proportions of the types of cone photoreceptors and bringing the stimulation rates of these three types of cone photoreceptors closer to a normal person. Based on this, four types of 32 grade color vision correction spectral characteristic curves and parameters are obtained. The present inventors have found that color blindness can be classified into any of four types of color blindness correction spectra of 32 grades, and that color blindness can be corrected by applying a spectacle lens having a color vision correction spectrum characteristic curve corresponding to the color blindness prescription.

[0007]

However, U.S. Pat. No. 5,369,453 proposes a theory of color vision correction. However, actual color vision correction spectacle lenses are only prototypes, and are inexpensive and high performance which can be provided to the market. There is no proposal for a spectacle lens for color correction.

[0008] Among the four types of color vision correction spectral characteristic curves, there is a type in which the spectrum changes drastically and the absorption of light must be partially made 100%, which is described in US Pat. No. 5,369,453. With vacuum deposition (partially reflective film), it is difficult to manufacture a lens having an inexpensive and accurate color vision correction spectral characteristic curve. In particular, in plastic lenses, which have been in great demand in recent years, the materials constituting the vacuum deposited film are limited, so that it is not easy to accurately form all four types of color vision correction spectral characteristic curves in a plastic spectacle lens.

[0009] When a person with color vision deficiency wears these glasses, colors that could not be identified until now can be identified. There is a problem that cannot be understood.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a high-performance spectacle lens for color vision correction which is inexpensive and has color vision correction spectral characteristics having a density gradient.

[0011]

In order to obtain a desired color vision correction spectral characteristic curve only by coloring, the present inventor applies a density gradient (gradation coloring) to the corrected spectral characteristic curve in a colored portion. By having it, it is possible to recognize it with both correction and the naked eye. In the case of a film formed of a partially reflecting film of coloring and light, a concentration gradient is similarly formed by coloring, and a partially reflecting film is provided on the surface. That is, it is possible to change the degree of correction between the colored portion and the non-colored portion.

Therefore, the spectacle lens for color vision correction according to the first aspect is a spectacle lens having a color vision correction spectral characteristic curve capable of converting the stimulus value proportion of three types of cone photoreceptors of the retina of a color blind person. In addition, the provision of a density gradient further improves the correction effect.

The color vision correcting spectacle lens according to claim 2 is
The eyeglass lens for color vision correction according to claim 1, wherein the eyeglass lens is made of plastic.

According to a third aspect of the present invention, there is provided a color vision correcting spectacle lens.
3. The spectacle lens for color vision correction according to claim 1, wherein the colorant is a dye and / or a pigment. 4.

According to a fourth aspect of the present invention, there is provided a spectacle lens for color vision correction,
The spectacle lens for color vision correction according to any one of claims 1 to 3, wherein the partial reflection film has a laminated structure of 16 layers or less.

The spectacle lens for color vision correction according to claim 5 is
The spectacle lens for color vision correction according to claim 1, wherein the partially reflective film is formed on a convex surface of the spectacle lens, and an antireflection film is formed on a concave surface of the spectacle lens. And

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the color vision correcting spectacle lens of the present invention will be described, but the present invention is not limited to the following embodiments.

As described above, the spectacle lens for color vision correction of the present invention is a spectacle lens having a color vision correction spectral characteristic curve capable of converting the stimulus value proportions of the three types of cone photoreceptors of the retina of a color-blind person. In addition, the degree of correction is changed in one lens.

The color vision correction spectral characteristic curve is slightly different from the 4 types and 32 grades described in US Pat. No. 5,369,453, and the type B type is greatly changed. Table 1 shows the absorptance of each type at a specific wavelength. FIGS. 1 to 4 show the respective spectral characteristic curves.
Shown in

[0020]

[Table 1]

The color blindness of color blindness or color weakness is one of these 4
Classification can be classified into 32 grades, and a color-blind person wears a spectacle lens having a spectral characteristic curve adapted to himself,
The stimulus value proportions of the three types of cone photoreceptors are converted so as to approach a normal person, and the color vision abnormality is corrected.

The color vision correcting spectacle lens of the present invention is characterized in that such a color vision correcting spectral characteristic curve is formed on a glass or plastic lens by applying a concentration gradient with a coloring agent.

In the present invention, a plastic lens can be particularly preferably used. The type of the plastic lens is not particularly limited, but a resin obtained by radical polymerization of diethylene glycol bis (allyl carbonate), a polyurethane resin obtained by reacting an isocyanate compound with a hydroxy compound such as diethylene glycol, and an isocyanate compound and polythiol A thiourethane-based resin reacted with a compound can be exemplified.

Since the spectacle lens of the present invention is intended for correcting color vision, unlike a normal lens for correcting visual acuity, it may not require a refractive power. Therefore, it may not be a lens, but in the present invention,
Such materials having no refracting power are also included. It will be common to provide a vision correction lens with the color vision correction spectral characteristic curve described above. As a vision correction lens, a normal plastic lens such as a single focus lens for near vision and a long vision and a multifocal lens is basically used.

Usually, a hard coat film is formed on a plastic lens in order to impart abrasion resistance.

Such a hard coat film is mainly composed of metal oxide fine particles and an organosilicon compound containing a polymerizable group and a hydrolyzable group in one molecule, and is dispersed in a dispersion medium such as water, an alcohol or another organic solvent. A film can be formed on a plastic lens using the silicone-based composition dispersed in a colloidal state.

Here, as the metal oxide fine particles, for example, SiO ₂ , Al ₂ O ₃ , SnO ₂ , Sb ₂ O ₅ , Ta
_{2 0 5, CeO 2, La} 2 0 3, Fe 2 0 3, ZnO, WO 3,
_{ZrO 2, In 2 0 3,} Ti0 2 of the inorganic oxide fine particles, or composite fine particles and the like composed of two or more of these inorganic oxides.

Specific examples of the organosilicon compound containing a polymerizable group and a hydrolyzable group in one molecule include vinyltrialkoxysilane, vinyltrichlorosilane, vinyltri (β-methoxy-ethoxy) silane, allyltrialkoxy. Silane, acryloxypropyl trialkoxysilane, methacryloxypropyl trialkoxysilane, methacryloxypropyl dialkoxymethylsilane, γ-glycidoxypropyl trialkoxysilane, β- (3,4-epoxycyclohexyl) -ethyltrialkoxysilane, Mercaptopropyl trialkoxysilane, γ-aminopropyl trialkoxysilane, N-β (aminoethyl) -γ-aminopropylmethyldialkoxysilane and the like can be mentioned.

It is preferable to add a polyfunctional epoxy compound and / or a disilane compound in addition to the above two components as a dyeable type hard coat that can be dyed with a dye.

Specific examples of the polyfunctional epoxy compound include 1,6-hexanediol diglycidyl ether,
Ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, triethylene glycol diglycidyl ether, tetraethylene glycol diglycidyl ether, nonaethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, dipropylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether,
Tetrapropylene glycol diglycidyl ether, nonapropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, diglycidyl ether of neopentyl glycol hydroxyhyparic acid ester, trimethylolpropane diglycidyl ether, trimethylolpropane triglycidyl ether, glycerol di Glycidyl ether, glycerol triglycidyl ether, diglycerol diglycidyl ether, diglycerol triglycidyl ether, diglycerol tetraglycidyl ether, pentaerythritol diglycidyl ether, pentaerythritol triglycidyl ether, pentaerythritol tetraglycidyl ether, dipentaerythritol tetraglycidyl ether , Aliphatic epoxy compounds such as rubitol tetraglycidyl ether, diglycidyl ether of tris (2-hydroxyethyl) isocyanurate, triglycidyl ether of tris (2-hydroxyethyl) isocyanurate, isophoronediol diglycidyl ether, bis-2, Alicyclic epoxy compounds such as 2-hydroxycyclohexylpropane diglycidyl ether, resorcin diglycidyl ether, bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S diglycidyl ether,
Aromatic epoxy compounds such as orthophthalic acid diglycidyl ester, phenol novolak polyglycidyl ether, and cresol novolak polyglycidyl ether are exemplified.

As the disilane compound, a compound represented by the following general formula (1) can be exemplified.

[0032]

Embedded image

(Wherein, R ³ and R ⁴ are hydrocarbon groups having 1 to 6 carbon atoms, X ² and X ³ are hydrolyzable groups, and Y is an organic group containing a carbonate group or an epoxy group. And k
And m is 0 or 1. Examples of a method of applying a lens substrate surface with a silicone composition containing such components include a dipping method, a spray method, and a spin coating method. After application, drying and baking form a hard coat film. can do.

The coloring agent colors the plastic lens,
The above-described color vision correction spectrum characteristic curve is obtained by a filter effect of absorbing light having a specific wavelength and weakening transmittance. For example, there is a method in which a pigment is mixed with a monomer material before polymerization of a plastic lens, or a method in which a plastic lens is dyed with a dye. The method of dyeing a plastic lens includes a method of directly dyeing a lens substrate and a method of forming a dyeable type hard coat film on the surface of the lens substrate and then dyeing the hard coat film.

As the dye which can be used in the present invention, reactive dyes, oil-soluble dyes, disperse dyes and the like can be used. In order to color a plastic lens with a reactive dye, a reactive dye capable of forming a covalent bond with a monomer or a hydroxyl group in a polymer is contained in a raw material as a coloring component, and a kneading method of polymerizing the reactive dye is used. There is a method in which a reactive dye capable of forming a covalent bond with a hydroxyl group or the like in a base material is dipped and adhered. For complete dyeing, each method is preferably a method of immersion in an alkaline solution.

The oil-soluble dyes include Solvent Yellow 102, Solvent Yellow 104, Solvent Yellow 117, Solvent Yellow 157,
Solvent Orange 68, Solvent Orange
72, Solvent Orange 79, Solvent Green 26, Solvent Violet 33, Solvent Violet 39, Solvent Brown 4
6, Solvent Black 36, Solvent Black 50, Solvent Blue 97, Solvent Blue 99, Solvent Red 160, Solvent Red 175, Solvent Red 180, Solvent Red 216 and the like.

As the disperse dye, Disperse ™
Yellow 54, Disperse Yellow 122, Disperse Yellow 124, Disperse Yellow 128, Disperse Yellow 134, Disperse Yellow 140, Disperse Orange
5, Disperse Orange 37, Disperse Orange 93, Disperse Orange 103, Disperse Orange 112, Disperse Orange 134, Disperse Orange 370, Disperse Green 7 , Dispers Violet 6
1, Disperse Violet 63, Disperse Brown 1, Disperse Brown 13, Disperse Blue 27, Disperse Blue 5
4. Disperse Blue 56, Disperse Blue 176, Disperse Blue 182, Disperse Blue 193, Disperse Red 14.
6, Disperse Red 199, Disperse Red 202, Disperse Red 204, Disperse Red 291 and Disperse Red 29
1 and the like.

As a method of dyeing a lens substrate or a lens substrate on which a hard coat film is formed with a dye, a disperse dye is dispersed in boiling water or an oil-soluble dye is dissolved in an organic solvent. A method of immersing the material is general.

In this case, one of the above-mentioned dyes can be used alone or in combination of two or more in order to obtain a desired spectral characteristic curve.

As described above, by coloring a plastic lens with a stain, the above-described color vision correction spectrum can be formed by partial absorption of light of the stain. Colorants are inexpensive in cost. However, since the spectacle lens is colored deep red in the above-described visual correction spectral characteristic curve, it may not be preferable in terms of appearance.

On the other hand, the partial reflection film is also called a mirror coat, and is formed by a vacuum deposition method, an ion plating method,
It can be formed by a sputtering method or the like, and is preferably formed on the above-mentioned hard coat film. In the vacuum evaporation method, an ion beam assist method in which an ion beam is simultaneously irradiated during the evaporation may be used. Further, as the film configuration, either a single layer or a multilayer may be used.

Examples of usable inorganic substances include, for example, Si
O ₂ , SiO, ZrO ₂ , TiO ₂ , TiO, Ti ₂ O ₃ ,
Ti ₂ O ₅ , Al ₂ O ₃ , Ta ₂ O ₅ , CeO ₂ , MgO, Y ₂
O ₃ , SnO ₂ , MgF ₂ , WO _{3 and the} like can be exemplified, and these inorganic substances can be used alone or in combination of two or more. In particular, for plastic lenses, ZrO ₂ , Si which can lower the deposition temperature
O ₂ and TiO ₂ can be preferably used.

Similarly, for the antireflection film, a vacuum evaporation method,
It can be formed by an ion plating method, a sputtering method, or the like. In the vacuum evaporation method, an ion beam assist method in which an ion beam is simultaneously irradiated during the evaporation may be used. As the film configuration, either a single-layer antireflection film or a multilayer antireflection film may be used.

Examples of usable inorganic substances include, for example, Si
O ₂ , SiO, ZrO ₂ , TiO ₂ , TiO, Ti ₂ O ₃ ,
Ti ₂ O ₅ , Al ₂ O ₃ , Ta ₂ O ₅ , CeO ₂ , MgO, Y ₂
O3, SnO _2, MgF _2, WO _3, etc. can be exemplified, can be used alone or in admixture of two or more of these inorganic substances. In particular, for plastic lenses, ZrO ₂ , Si which can lower the deposition temperature
O ₂ and TiO ₂ can be preferably used.

When both the partial reflection film and the antireflection film are formed on a single spectacle lens, the partial reflection film cannot be formed on the partial reflection film. Preferably, an anti-reflection film is formed on the concave side of the lens. Thereby, unnatural reflected light is less included in the light entering the eye, and a spectacle lens that is easy to see can be obtained.

The partial reflection film reflects light of a specific wavelength,
By preventing light of that wavelength from reaching the eyes, a color vision correction spectral characteristic curve can be formed. Therefore, the reflected light is green, for example, and the eyeglass lens itself does not need to be colored, which is excellent in appearance.

However, the plastic lens and the inorganic film constituting these partial reflection film and antireflection film have considerably different coefficients of thermal expansion. Therefore, when forming a partial reflection film by laminating inorganic films, it is not possible to form the reflection film too thick, and the limit is about 16 layers. Increasing the number of layers may cause problems such as peeling during use.
When forming a partial reflection film or an antireflection film on a hard coat film, it is desirable to perform a surface treatment of the hard coat film. Specific examples of the surface treatment include an acid treatment, an alkali treatment, an ultraviolet irradiation treatment, a plasma treatment using a high-frequency discharge in an argon or oxygen atmosphere, and an ion beam irradiation treatment with argon, oxygen, or nitrogen.

[0048]

The present invention will be specifically described below with reference to examples.

Example 1 Plastic lenses having A-5 type color vision correction spectral characteristic curves were formed by gradation dyeing.

(1) Coloring of Lens Disperse Red 7 in 1 liter of pure water at 92 ° C.
3 was dispersed in 1.5 g to prepare a dyeing solution. Vista Halfmatic (Seiko Optical Products Co., Ltd.)
1.60 spectacle lens (Lens fabric for Seiko Super Lux, manufactured by Seiko Epson Corporation)
For 25 minutes. (2) Preparation of coating liquid 14.4 Kg of butyl cellosolve, sol of methanol-dispersed titanium dioxide-zirconium dioxide-silicon dioxide composite fine particles (manufactured by Catalyst Chemical Industry Co., Ltd., solid content concentration 20% by weight)
After mixing 60.3 kg, 17 kg of γ-glycidoxypropyltrimethoxysilane was mixed. 6 Kg of a 0.05 N aqueous hydrochloric acid solution was added dropwise to the mixture with stirring, and the mixture was further stirred for 4 hours and then aged for 24 hours. Thereafter, a silicon surfactant (trade name “L-700” manufactured by Nippon Unicar Co., Ltd.) was used.
1)) 30 g was added, and the mixture was stirred for 4 hours and then aged all day long to obtain a coating liquid.

(3) Coating and Curing The coating liquid thus obtained was coated by a dipping method. The lifting speed was 18 cm / min. After air-drying at 80 ° C. for 20 minutes after application, baking was performed at 130 ° C. for 120 minutes. The thickness of the hard coat film thus obtained was about 2 microns.

(4) Formation of Anti-Reflection Thin Film Both surfaces of the obtained lens were subjected to an ion beam irradiation treatment with oxygen gas (acceleration voltage 500 V × 60 seconds), and then SiO ₂ and ZrO ₂ were sequentially placed from the substrate to the atmosphere. ₂ , Si
An antireflection multilayer film composed of five layers of O ₂ , TiO ₂ , and SiO ₂ is vacuum-deposited (CES-34 manufactured by Vacuum Instruments Co., Ltd.)
Was formed. At this time, a fourth layer of TiO ₂ was formed by ion beam assisted vapor deposition. The optical film thickness of each vapor deposition layer is as follows: first SiO ₂ , the next equivalent film layer of ZrO ₂ and SiO ₂ is λ / 4, the TiO ₂ layer is λ / 2, and the uppermost layer is SiO ₂
The layer was formed to have λ / 4. The design wavelength λ is 5
20 nm.

FIG. 5 shows the spectral transmittance of the dyed portion of this lens in visible light.

[Example 2] A plastic lens having an A-7 type color vision correction spectral characteristic curve was formed by a combination of gradation staining and mirror coating.

(1) Coloring of Lens The lens was colored in the same manner as in Example 1.

(2) Preparation of Coating Solution A hard coat composition was prepared in the same manner as in Example 1.

(3) Coating and Curing In the same manner as in Example 1, the spectacle lens was immersed in the coating liquid and baked to form a hard coat film.

(4) Formation of Mirror Coat Film The convex surface of the obtained lens was subjected to an ion beam irradiation treatment with oxygen gas (acceleration voltage 500 V × 60 seconds), and then shown in Table 2 in order from the substrate to the atmosphere. A mirror coat consisting of eight layers with a material and an optical film thickness was formed by a vacuum evaporation method (CES-34, manufactured by Vacuum Instruments Co., Ltd.). In addition,
The design wavelength λ was 520 nm.

(4) Formation of anti-reflection thin film After the convex surface of the obtained lens is subjected to an ion beam irradiation treatment with oxygen gas (acceleration voltage: 500 V × 60 seconds), it is shown in Table 2 in order from the substrate to the atmosphere. A mirror coat consisting of eight layers with a material and an optical film thickness was formed by a vacuum evaporation method (CES-34, manufactured by Vacuum Instruments Co., Ltd.). In addition,
The design wavelength λ was 520 nm.

[0060]

[Table 2]

FIG. 6 shows the spectral transmittance of the unstained portion of this lens in visible light. FIG. 7 shows the spectral transmittance of the stained portion in visible light.

Example 3 A plastic lens having a B-2 type color vision correction spectral characteristic curve was formed by gradation dyeing.

(1) Coloring of Lens Disperse Red 1 in 1 liter of pure water at 92 ° C.
46 for 0.9 g, Disperse Blue 54 for 0.0
1 g and 14 g of Disperse Orange 370 were dispersed to prepare a dyeing solution. Vista Halfmatic Co., Ltd.
Using a Seiko Optical Products), a 1.56 spectacle lens (lens fabric for Seiko Plax II Super Frontier, manufactured by Seiko Epson Corporation) with a refractive index of 1.56 was subjected to gradation dyeing of the lens for 30 minutes.

(2) Preparation of Coating Solution 508 g of butyl cellosolve, sol of water-dispersed antimony pentoxide fine particles (manufactured by Nissan Chemical Industries, Ltd., solid content: 30 wt.
%), 55 g of γ-glycidoxypropylmethyldimethoxysilane and 55 g of γ-glycidoxypropyltrimethoxysilane were mixed. 25 g of a 0.05N aqueous hydrochloric acid solution was added dropwise to this mixed solution while stirring, and the mixture was stirred for 4 hours and then aged for 24 hours. To this solution, 67 g of glycerol-diglycidyl ether (trade name "Denacol EX-313", manufactured by Nagase Kasei Kogyo Co., Ltd.)
After addition, 3.7 parts of Fe (III) acetylacetonate were added.
g, 0.2 g of a silicon-based surfactant (manufactured by Big Chemie Co., Ltd .; trade name “BYK-300”) and a phenolic antioxidant (manufactured by Kawaguchi Chemical Industry Co., Ltd., trade name “Antage Crystal”) After adding 2 g and stirring for 4 hours, the mixture was aged all day and night to obtain a coating liquid.

(3) Coating and curing The coating liquid thus obtained was coated by a spray method.

The spraying was performed using Iwata Weider 61 (manufactured by Iwata Coating Machine Co., Ltd .; nozzle diameter 1 mm) at a spray pressure of 3 kg / square cm and a paint discharge rate of 100 ml / min.

After air-drying at 80 ° C. for 10 minutes after application, 13
The firing was performed at 0 ° C. for 2 hours. The thickness of the hard coat film thus obtained was about 4 microns.

(4) Formation of Antireflection Thin Film After both surfaces of the obtained lens were subjected to ion beam irradiation treatment (acceleration voltage: 500 V × 60 seconds) with oxygen gas, SiO ₂ , ZrO were sequentially applied from the substrate to the atmosphere. ₂ , Si
An antireflection multilayer film composed of five layers of O ₂ , TiO ₂ , and SiO ₂ is vacuum-deposited (CES-34 manufactured by Vacuum Instruments Co., Ltd.)
Was formed. At that time, a fourth layer of TiO ₂ was formed by ion beam assisted vapor deposition. The optical film thickness of each vapor deposition layer is as follows: the first SiO ₂ , the next equivalent film layer of ZrO ₂ and SiO ₂ is λ / 4, the TiO ₂ layer is λ / 2, and the uppermost layer is SiO ₂
The layer was formed to have λ / 4. The design wavelength λ is 5
20 nm.

FIG. 8 shows the spectral transmittance of the dyed portion of this lens in visible light.

Example 4 A plastic lens having a B-2 type color vision correction spectrum characteristic curve was formed by using both mirror coating and dyeing.

(1) Preparation of coating liquid: 1832 g of methanol, 785 g of 1,4-dioxane,
5332 g of methyl cellosolve-dispersed titanium dioxide-iron trioxide-silicon dioxide composite fine particle sol (manufactured by Catalyst Chemical Industry Co., Ltd., solid content concentration: 20% by weight), methanol-dispersed colloidal silica (manufactured by Catalyst Chemical Industry Co., Ltd., trade name " Oscar 1
132 ", a solid content of 30% by weight), 102 g, and?-
902 g of glycidoxypropyltrimethoxysilane was mixed.

The mixture was mixed with a 0.05N hydrochloric acid aqueous solution 250
g was added dropwise with stirring, and after further stirring for 4 hours, the mixture was aged all day and night. To this solution, 762 g of 1,6-hexanediol diglycidyl ether (trade name “Denacol EX-212” manufactured by Nagase Kasei Kogyo Co., Ltd.) was added.
37 g of (CO ₄ ) ₂ and 5.5 g of Li (C ₅ H ₇ O ₂ )
g, a silicon-based surfactant (manufactured by Nippon Unicar Co., Ltd., trade name “L-7001” 3 g) and a hindered amine light stabilizer (Sankyo KK, trade name “Sanol LS-77”)
0 "), and the mixture was stirred for 4 hours and then aged all day long to obtain a coating solution.

(2) Coating and Curing The coating liquid thus obtained was applied to a spectacle lens having a refractive index of 1.60 (lens cloth for Seiko Super Lux manufactured by Seiko Epson Corporation) by an immersion method. Was.
The lifting speed was 23 cm / min. 80 after application
After air drying at 20 ° C for 20 minutes, baking was performed at 130 ° C for 60 minutes. The thickness of the hard coat film thus obtained was about 2 microns.

(3) Coloring of Lens Disperse Red 1 in 1 liter of pure water at 92 ° C.
46 0.3g, Disperse Blue 54 0.0
1 g and 14 g of Disperse Orange 370 were dispersed to prepare a dyeing solution. Vista Halfmatic Co., Ltd.
Gradation staining was performed for 23 minutes using Seiko Optical Products).

(4) Formation of Mirror Coat Film After subjecting the convex surface of the lens obtained by the above method to plasma treatment (argon plasma 400 W × 60 seconds), the materials shown in Table 2 in order from the substrate toward the atmosphere And a mirror coat film consisting of 12 layers with an optical film thickness of 12 layers was formed by a vacuum deposition method (BMC-IOOO, manufactured by Vacuum Instruments Co., Ltd.). The design wavelength λ was 520 nm.

(5) Formation of Antireflection Thin Film After the concave surface of the lens obtained by the above method is subjected to plasma treatment (argon plasma 400 W × 60 seconds), SiO ₂ and ZrO ₂ are sequentially applied from the substrate to the atmosphere. , Si
An antireflection multilayer film composed of five layers of O ₂ , ZrO ₂ , and SiO ₂ is vacuum-deposited (CES-34, manufactured by Vacuum Instruments Co., Ltd.)
Was formed. The optical thickness of each layer is
O ₂ layer, next ZrO ₂ and SiO ₂ equivalent film layer and next Z
The rO ₂ layer and the uppermost SiO ₂ layer were each formed to have λ / 4. The design wavelength λ was 520 nm.

FIG. 9 shows the spectral transmittance of the unstained portion of this lens in visible light. FIG. 10 shows the spectral transmittance of the stained portion in visible light.

Example 5 A plastic lens having a C-8 type color vision correction spectral characteristic curve was formed by gradation dyeing.

(1) Coloring of Lens Disperse Red 1 in 1 liter of pure water at 92 ° C.
46 and 0.08 g of Disperse Blue 54.
A dyeing solution was prepared by dispersing 15 g, 0.19 g of Disperse Orange 37 and 0.02 g of Disperse Yellow 54. The lens was subjected to gradation staining for 17 minutes using Vista Halfmatic (manufactured by Seiko Optical Products) on a refractive index of 1.60 spectacle lens (manufactured by Seiko Epson Corporation, lens fabric for Seiko Super Luxe).

(2) Preparation of coating liquid A composition for hard coat was prepared in the same manner as in Example 2.

(3) Coating and Curing In the same manner as in Example 2, the spectacle lens was immersed in the coating solution and baked to form a hard coat film.

(4) Formation of anti-reflection thin film After both surfaces of the lens obtained by the above method are subjected to plasma treatment (argon plasma 400 W × 60 seconds), SiO ₂ and ZrO ₂ are sequentially applied from the substrate to the atmosphere. , Si
An antireflection multilayer film composed of five layers of O ₂ , ZrO ₂ , and SiO ₂ is vacuum-deposited (CES-34, manufactured by Vacuum Instruments Co., Ltd.)
Was formed. The optical thickness of each layer is
O ₂ layer, next ZrO ₂ and SiO ₂ equivalent film layer and next Z
The rO ₂ layer and the uppermost SiO ₂ layer were each formed to have λ / 4. The design wavelength λ was 520 nm.

FIG. 11 shows the spectral transmittance of the dyed portion of this lens in visible light.

Example 6 A plastic lens having a D-8 type color vision correction spectral characteristic curve was formed by gradation dyeing.

(1) Coloring of Lens Disperse Red 1 in 1 liter of pure water at 92 ° C.
46 and 0.02 g of Disperse Blue 54.
A dispersion was prepared by dispersing 04 g of Disperse Orange 37 and 1.00 g of Disperse Yellow 54 and 0.70 g of Disperse Yellow 54. The lens was subjected to gradation dyeing for 12 minutes using Vista Halfmatic (manufactured by Seiko Optical Products) on a refractive index of 1.60 spectacle lens (manufactured by Seiko Epson Corporation, lens fabric for Seiko Super Luxe).

(2) Preparation of Coating Liquid A hard coat composition was prepared in the same manner as in Example 2.

(3) Coating and Curing In the same manner as in Example 2, the spectacle lens was immersed in the coating solution and baked to form a hard coat film.

(4) Formation of anti-reflection thin film After both surfaces of the obtained lens were subjected to an ion beam irradiation treatment (acceleration voltage: 500 V × 60 seconds) with oxygen gas, SiO ₂ , ZrO were sequentially applied from the substrate to the atmosphere. ₂ , Si
An antireflection multilayer film composed of five layers of O ₂ , TiO ₂ , and SiO ₂ is vacuum-deposited (CES-34 manufactured by Vacuum Instruments Co., Ltd.)
Was formed. At this time, a fourth layer of TiO ₂ was formed by ion beam assisted vapor deposition. The optical film thickness of each vapor deposition layer is as follows: first SiO ₂ , the next equivalent film layer of ZrO ₂ and SiO ₂ is λ / 4, the TiO ₂ layer is λ / 2, and the uppermost layer is SiO ₂
The layer was formed to have λ / 4. The design wavelength λ is 5
20 nm.

FIG. 12 shows the spectral transmittance of this lens for visible light.

[0090]

The spectacle lens for color vision correction according to the present invention enables a person with abnormal color vision to be given more accurate discrimination ability. In other words, by combining a portion having the color vision correction spectral characteristic curve with a portion having no naked eye or a portion having a weak correction effect, it is possible to identify colors more widely.

[Brief description of the drawings]

FIG. 1 is a graph showing an A-type color vision correction spectrum characteristic curve.

FIG. 2 is a graph showing a type B color vision correction spectrum characteristic curve.

FIG. 3 is a graph showing a C-type color vision correction spectrum characteristic curve.

FIG. 4 is a graph showing a D-type color vision correction spectrum characteristic curve.

FIG. 5 is a graph showing the spectral transmittance of the spectacle lens obtained in Example 1.

FIG. 6 is a graph showing a spectral transmittance of a non-stained portion of the spectacle lens obtained in Example 2.

FIG. 7 is a graph showing the spectral transmittance of a stained part of the spectacle lens obtained in Example 2.

FIG. 8 is a graph showing the spectral transmittance of the spectacle lens obtained in Example 3.

FIG. 9 is a graph showing a spectral transmittance of a non-stained portion of the spectacle lens obtained in Example 3.

FIG. 10 is a graph showing the spectral transmittance of the stained part of the spectacle lens obtained in Example 3.

FIG. 11 is a graph showing the spectral transmittance of the spectacle lens obtained in Example 5.

FIG. 12 is a graph showing the spectral transmittance of the spectacle lens obtained in Example 6.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Satoshi Kubota 3-3-5 Yamato, Suwa City, Nagano Prefecture Seiko Epson Corporation F-term (reference) 2H006 BA01 BA03 BA06 4J002 CG011 CK051 FD096 GF00 GP01

Claims (5)

[Claims] 1. A spectacle lens having a color vision correction spectrum characteristic curve capable of converting a stimulus value proportion of three types of cone photoreceptor cells of a retina of a color blind person, wherein the color vision correction spectrum characteristic curve is a colorant or What is claimed is: 1. A spectacle lens for color vision correction, comprising a colorant and a partially reflecting film of light, wherein a color vision correction spectral characteristic has a density gradient. 2. The spectacle lens for color vision correction according to claim 1, wherein the spectacle lens is made of plastic. 3. The spectacle lens for color vision according to claim 1, wherein the colorant is a dye and / or a pigment. 4. The spectacle lens for color vision correction according to claim 1, wherein the partial reflection film has a laminated structure of 16 layers or less. 5. The spectacle lens for color vision correction according to claim 1, wherein the partially reflective film is formed on a convex surface of the spectacle lens, and an anti-reflection film is formed on a concave surface of the spectacle lens. A spectacle lens for color vision correction, comprising: