Composition for lens and lens including the same

Abstract

The present invention relates to a lens composition and a lens comprising the same, wherein the composition comprises metal nanoparticles having a core-shell structure, wherein the core comprises one type of metal and the shell comprises two or more types of metals, wherein the lens may be a contact lens worn directly on the eyeball or a lens for eyewear such as glasses, goggles, or swimming goggles, and the shell comprises two or more types of metals, and thus various types of color blindness can be corrected depending on the composition of the core and shell or the composition of the shell itself, thereby providing a color blindness correction lens tailored to the patient.

Description

Technology Field

[0001] The present invention relates to a lens composition and a lens comprising the same, and more specifically, to a lens composition comprising metal nanoparticles having a core-shell structure, wherein the shell contains two or more types of metals, and wherein the composition of the core and the shell or the composition ratio of the metals within the shell can correct various types of color blindness, and a lens comprising the same. Background Technology

[0003] Color blindness is a type of color vision deficiency characterized by difficulty distinguishing specific colors due to abnormalities or dysfunction of the cone cells responsible for color detection. Although various studies have been conducted for decades to address this, an effective medical treatment has not yet been developed. Currently, a fundamental cure for color blindness is impossible, but correction is possible using color filters that filter out visible light of specific wavelengths, allowing patients with color blindness to lead normal lives.

[0004] Conventional lenses for color blindness correction, such as eyeglasses, are manufactured by adding a coloring agent to an optically transparent substrate. While the coloring agent allows for correction of specific colors, there are issues with the inability to comprehensively address various symptoms of color blindness and to provide precise correction tailored to the individual patient's needs.

[0005] Recently, color vision correction technology utilizing gold nanoparticles has been developed. While this technology enables effective correction when targeting red-green color blindness, there is a possibility of performance and stability degradation during long-term use due to low aggregation stability depending on the size and structure of the gold nanoparticles. Furthermore, there is a problem in that it cannot effectively correct blue-yellow color blindness caused by a deficiency of S-cones in cone cells. These issues limit the scope and accuracy of color blindness correction and make personalized approaches for various symptoms difficult. Therefore, there is a need for the development of color blindness correction technology that can overcome these limitations and provide customized correction for the diverse symptoms of individual patients. Prior art literature

[0007] Registered Patent No. 10-2674937 (Registered June 10, 2024) The problem to be solved

[0008] The present invention aims to provide a lens composition and a lens comprising the same, wherein the composition of the core and shell or the composition of the shell itself is changed to correct various types of color blindness, and the shell comprises metal nanoparticles having a core-shell structure and two or more types of metals. means of solving the problem

[0010] One embodiment of the present invention for achieving the above-described purpose relates to a lens composition characterized by comprising metal nanoparticles having a core-shell structure, wherein the core comprises one type of metal and the shell comprises two or more types of metals.

[0011] The above core may include gold, silver, platinum, aluminum, iron, zinc, copper, tin, bronze, brass, or nickel.

[0012] The above shell may include two or more metals selected from the group consisting of gold, silver, platinum, aluminum, iron, zinc, copper, tin, bronze, brass, or nickel.

[0013] The particle size of the metal nanoparticles with the core-shell structure above may be 30 to 50 nm.

[0014] The present invention includes a lens comprising the above lens composition. Effects of the invention

[0016] The lens composition of the present invention and the lens including the same comprise metal nanoparticles having a core-shell structure, and the shell comprises two or more types of metals, so that the lens composition and the lens can filter light of a specific wavelength depending on changes in the composition of the core and the shell or the composition ratio of the metals within the shell.

[0017] A color blindness correction lens comprising the lens composition of the present invention can correct not only major color blindnesses such as red-green color blindness and blue-yellow color blindness but also various other types of color blindness by changing the composition of the core-shell structured metal nanoparticles included in the lens, thereby providing a color blindness correction lens tailored to the patient.

[0018] In addition, the color blindness correction lens of the present invention can be applied to various types of eyewear lenses, such as contact lenses, eyeglasses, sunglasses, swimming goggles, and goggles, and can provide a color blindness correction effect in various situations. Brief explanation of the drawing

[0020] Figures 1(A) and 1(B) are TEM analysis images of the core metal, and Figure 1(C) is a TEM analysis image of the core-shell metal nanoparticle. Figure 2 shows the DLS analysis results of core and core-shell metal nanoparticles. Figure 3 shows the DLS analysis results according to the composition of the metal constituting the shell. Figure 4 shows the EDS analysis results. Figure 5 is a diagram showing the appearance and absorption spectrum of a core-shell metal nanoparticle solution. Figure 6 is a graph showing the LSPR peaks of each sample. Figure 7 is a photograph of the exterior of each lens. Figures 8(A) and 8(B) are graphs showing the normalized transmittance of the lens and the wavelength range capable of color filtering, respectively. Figure 9 shows the result of simulating wavelength filtering of the sample. Figure 10 is a graph comparing transmittance with a commercial lens. Figure 11 is a photograph comparing the appearance when worn with a commercial lens. Specific details for implementing the invention

[0021] Before describing the preferred embodiments of the present invention in detail below, it should be noted that the terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0022] Throughout this specification, when a part is described as “comprising” a certain component, it means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0023] Throughout this specification, “%” used to indicate the concentration of a specific substance means (weight / weight)% for solid / solid, (weight / volume)% for solid / liquid, and (volume / volume)% for liquid / liquid, unless otherwise noted.

[0024] Hereinafter, embodiments of the present invention are examined. However, the scope of the present invention is not limited to the following preferred embodiments, and a person skilled in the art to which the present invention pertains may implement various modified forms from the contents described in the specification.

[0025] Color vision deficiency and color blindness are visual disorders that cause daily difficulties for many people. Color blindness is a condition in which one cannot distinguish colors at all, distinguishing objects only as white, gray, and black, while color vision deficiency is a disorder in which one has difficulty distinguishing specific colors. In Korea, the prevalence of color vision deficiency is approximately 8–10% for men and 0.5–1% for women. Since patients with color vision deficiency face not only inconveniences in daily life but also limitations in career choices, various studies have been continuously conducted to address these issues; however, no effective medical treatment method has been developed to date.

[0026] Currently, color blindness can be corrected using color filters that filter out visible light of specific wavelengths to enable patients to distinguish colors. Since this method corrects specific colors using coloring agents on a transparent substrate, it is effective for patients with certain types of color blindness; however, there are limitations in that it is difficult to comprehensively address the various other types of color blindness symptoms excluding those specific ones, and it is difficult to provide precise correction tailored to the symptom characteristics of individual patients.

[0027] Recently, color vision correction technology utilizing gold nanoparticles has been developed. While this technology enables effective correction when targeting red-green color blindness, there is a possibility of performance and stability degradation during long-term use due to low aggregation stability depending on the size and structure of the gold nanoparticles. Additionally, there is a limitation in that it cannot effectively correct other types of color blindness, such as blue-yellow color blindness, in addition to red-green color blindness.

[0028] In order to overcome the limitations of existing technology, the present invention provides a lens composition comprising core-shell metal nanoparticles as a color filter and a lens comprising the same, wherein the shell contains two or more types of metals, and by changing the metal composition of the shell, the lens composition and lens can be provided to comprehensively address various symptoms of color blindness.

[0029] The present invention relates to a lens composition and a lens comprising the same, and specifically, to a lens composition comprising metal nanoparticles having a core-shell structure, wherein the shell comprises two or more types of metals, and a lens comprising the same.

[0030] The metal nanoparticles with the core-shell structure described above have the characteristic of selectively blocking light of specific wavelengths, and lenses containing such metal nanoparticles are effective in correcting color blindness by blocking specific light. Since the wavelengths blocked vary depending on the composition of the metal contained in the shell of the metal nanoparticles, the wavelengths blocked by the lens can be controlled by adjusting the composition of the shell, thereby enabling customized correction of color blindness with various symptoms. Therefore, it is possible to provide patient-specific color blindness correction lenses.

[0031] In general, nanoscale metal nanoparticles possess unique optical properties as noble metal nanoparticles due to Localized Surface Plasmon Resonances (LSPR). Localized Surface Plasmon Resonance is a phenomenon in which conduction electrons on the surface of metal nanoparticles resonate collectively and vibrate in response to incident light. This allows for the strong absorption and scattering of specific wavelengths, and since this phenomenon blocks visible light of specific wavelengths, color blindness correction can be achieved.

[0032] In particular, since changes in refractive index occur depending on the size or shape of metal nanoparticles, leading to variations in the peak intensity and wavelength of the plasmon spectrum, theoretically, precise control of these factors can effectively block visible light of desired wavelengths. However, adjusting the size of metal nanoparticles can lead to aggregation issues between particles, while adjusting the shape can cause differences in optical properties between particles, resulting in a broader light scattering distribution. Consequently, it is currently difficult to address various types of color blindness by controlling the size or shape of metal nanoparticles.

[0033] Accordingly, the present invention designs a core-shell structure for metal nanoparticles, uses two or more types of metals in the shell, and by changing the composition of the metals included in the shell, it is possible to respond to various types of color blindness without changing the size or shape of the metal nanoparticles. This method allows for precise control of local surface plasmon resonance without affecting the core size, thereby maintaining stability and preventing aggregation between metal nanoparticles.

[0034] One embodiment of the present invention relates to a lens composition, wherein the lens composition according to the present embodiment comprises metal nanoparticles having a core-shell structure. In this case, the core comprises one type of metal, and the shell may comprise two or more types of metals.

[0035] The metal nanoparticles with the core-shell structure described above are materials that act as color filters by inducing localized surface plasmon resonance, providing a color blindness correction function to lens compositions.

[0036] The core constituting the core-shell structured metal nanoparticles may contain one type of metal, and the shell may contain two or more types of metals. With this configuration, controlling the composition of the two or more metals contained in the shell allows for the control of the wavelength absorbed by the local surface plasmon resonance phenomenon, thereby offering the advantage of applying the color blindness correction effect of the metal nanoparticles to various types of color blindness. In particular, since the absorption wavelength is changed by altering the composition of the shell, there is no change in the size or shape of the core or metal nanoparticles; thus, it is free from problems of metal nanoparticle aggregation or non-uniform and unstable correction characteristics, and can provide a stable and effective color blindness correction effect.

[0037] The core may include gold, silver, platinum, aluminum, iron, zinc, copper, tin, bronze, brass, or nickel. The particle size of the core may be 5 to 15 nm, and by having such a narrow range of particle sizes, it is possible to form core-shell metal nanoparticles of uniform size, thereby enabling stable color blindness correction effects through localized surface plasmon resonance phenomena caused by the metal nanoparticles.

[0038] The above shell may include two or more metals selected from the group consisting of gold, silver, platinum, aluminum, iron, zinc, copper, tin, bronze, brass, or nickel, and by changing the composition of two or more metals included in the shell, a lens composition for correcting color blindness that can respond to various types of color blindness may be provided.

[0039] The particle size of the metal nanoparticles with the core-shell structure above may be 30 to 50 nm.

[0040] The above lens composition can be impregnated into a lens to exhibit a color blindness correction function, or it can be directly used to form a lens substrate by further including a base resin and curing the lens composition itself. Additionally, a color blindness correction function can be realized by manufacturing a color blindness correction lens through the application of the above lens composition by coating it onto a lens substrate.

[0041] The above base resin is a material that acts as a dispersion medium in which metal nanoparticles can be dispersed, and simultaneously acts as a basic matrix of the lens substrate when the lens composition is used as a lens substrate, and acts as a matrix of the coating layer while adhering the coating liquid to the lens substrate when the lens composition is used as a coating agent to coat the lens substrate. This base resin may be included in an amount of 50 to 99.99 wt% based on the total weight of the lens composition.

[0042] The above base resin may include at least one of monomers, oligomers, and polymers, and may additionally add an initiator to initiate polymerization as needed. The initiator may be selected from the group consisting of peroxodicarbonates, peroxyesters, perketals, and mixtures thereof, and suitable initiators may include one or more selected from the group consisting of benzoyl peroxide, methyl ethyl peroxide, methyl ethyl ketone peroxide, di-t-butyl peroxide, lauroyl peroxide, acetyl peroxide, diisopropyl peroxydicarbonate, bis(4-t-butylcyclohexyl) peroxydicarbonate, t-butyl peroxy-2-ethylhexanoate, and t-hexyl peroxy-2-ethylhexanoate. The compound may include one or more azo compounds selected from the group consisting of 2,2'-azobis(isobutyronitrile), dimethyl 2,2'-azobis(2-methylpropionate), 2,2'-azobis(2-methylbutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), and 4,4'-azobis(4-cyanopentanic acid).

[0043] The above base resin may comprise at least one polymer selected from the group consisting of polypropylene, polyurethane, polyethylene, polyvinylidene fluoride, polytetrafluoroethylene, polyethersulfone, polydimethylsilane, and polymethyl methacrylate. Alternatively, it may comprise a compound containing at least one functional group among an acrylic functional group, a vinyl functional group, an allyl functional group, a silane functional group, a urethane functional group, and a polyol functional group.

[0044] For example, a compound containing an acrylic functional group may include one or more selected from the group consisting of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, acrylic acid, 2-hydroxyethyl methacrylate, glycidyl methacrylate, methylglycidyl methacrylate, acrylamide, n-methyl acrylamide, hydroxyalkyl acrylate, and polymers thereof.

[0045] For example, a compound containing a vinyl functional group may include at least one selected from the group consisting of polyvinylpyrrolidone, poly(n-vinyllactam), poly(n-vinyl-methylacetamide), poly(n-vinyl-n-ethylacetamide), and poly(n-vinylformamide), but is not limited thereto.

[0046] For example, a compound containing an allyl functional group may include at least one selected from the group consisting of ethylene glycol bis(allyl carbonate), ethylene glycol bis(allyl carbonate), diethylene glycol bis(allyl carbonate) oligomers, ethylene glycol bis(allyl carbonate) oligomers, bisphenol A bis(allyl carbonate), diallyl phthalate, diallyl isophthalate, and diallyl terephthalate, but is not limited thereto.

[0047] For example, compounds containing a silane functional group may include alkoxysilanes such as tetraethoxysilane, tetramethoxysilane, tetra(n-propoxy)silane, and tetra(n-butoxy)silane; epoxysilanes such as glycidoxymethyltrimethoxysilane, glycidoxymethyltriethoxysilane, α-glycidoxyethyltrimethoxysilane, β-glycidoxyethyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane; and epoxyalkoxysilanes.

[0048] For example, a compound containing a urethane functional group can be obtained by reacting a compound having two isocyanate functional groups and a compound having two alcohol, thiol, or epithio functional groups. In this case, an organotin compound such as dimethyltin chloride or dibutyltin chloride may be used as an initiator.

[0049] Compounds having two isocyanate functional groups may include, for example, at least one selected from the group consisting of methylene diphenyl diisocyanate (MDI), dibenzyl diisocyanate (DBDI), toluene diisocyanate (TDI), xylylene diisocyanate (XDI), isophorone diisocyanate (IPDI), and hexamethylene diisocyanate (HDI).

[0050] Examples of compounds having a thiol functional group include pentaerythritol tetrakis mercaptopropionate, 4-mercaptomethyl-3,6-dithia-1,8-octanedithil, 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 2,5-dimercaptomethyl-1,4-dithian, etc., and compounds having an epithio functional group include bis(2,3-epithiopropyl)sulfide, bis(2,3-epithiopropyl)disulfide, and bis[4-(beta-epithiopropylthio)phenyl]sulfide, etc.

[0051] The types of compounds that can be used as base resins are not limited to those listed above, and any resin that can be used in the manufacture of lenses, eyeglasses, goggles, etc., may be used without special restrictions.

[0052] Meanwhile, another embodiment of the present invention relates to a lens comprising a lens composition, and since the lens composition is the same as that described in one embodiment of the present invention, a redundant description is omitted.

[0053] Here, the type of lens is not specifically limited and may be a contact lens worn directly on the eye, or a lens used for glasses, sunglasses, swimming goggles, etc.

[0054] The lens according to the present embodiment may be composed solely of the lens composition, or may be composed of a mixture in which the lens composition is mixed with other materials, and may be formed by impregnating the lens composition into a lens substrate or by coating the lens composition onto a lens substrate. Here, the lens substrate is not particularly limited to polymers or glass, and is preferably transparent.

[0055] The lens composition of the present invention and the lens containing the same comprise metal nanoparticles having a core-shell structure, and the shell contains two or more types of metals, so that various types of color blindness can be corrected depending on changes in the composition of the core and shell or the composition of the shell itself. Accordingly, a lens for correcting color blindness tailored to a patient can be provided.

[0056] In addition, it can be applied to various types of lenses, such as contact lenses, eyeglasses, sunglasses, swimming goggles, and goggles, providing color blindness correction effects in various situations.

[0057] Hereinafter, the specific operation and effects of the present invention will be explained through an embodiment of the present invention. However, this is presented as a preferred example of the present invention, and the scope of the rights of the present invention is not limited according to the embodiment.

[0059] [Preparation Example]

[0060] Core manufacturing

[0061] Distilled water was heated at 90°C for 15 minutes, 40.5 mL of 20 mM HAuCl was added, and 2 mL of a reducing solution (84 mM sodium citrate) was added to react until the color changed from dark blue to purple. After 24 hours, gold nanoparticles used in the core were prepared by removing the remaining citrate ions through dialysis.

[0062] Fabrication of core-shell structured metal nanoparticles

[0063] Various concentrations of 2 mM HAuCl4 and 2 mM AgNO3 were added to the solution containing the gold core, and reducing solutions of sodium citrate and ascorbic acid were added to deposit gold and silver on the gold core, thereby preparing metal nanoparticles with a core-shell structure containing gold as the core and gold and silver as the shell. Sample numbers according to the shell composition are listed in Table 1.

[0064] Contact lens manufacturing

[0065] A contact lens (Biofinity, CooperVision) was prepared and hydrated for 30 minutes to remove the preservative solution from the surface. The contact lens from which the preservative solution had been removed was immersed in a solution containing the previously prepared core-shell structured metal nanoparticles and stirred at 100 rpm at 40°C to impregnate the contact lens with the core-shell structured metal nanoparticles.

[0066] Sample number Shell composition (wt%) gold silver 1 0 100 2 10 90 3 20 80 4 30 70 5 40 60 6 50 50 7 60 40 8 70 30 9 80 20 10 90 10 11 100 0

[0068] [Experimental Example 1]

[0069] Morphological analysis was performed on the metal nanoparticles having a core-shell structure prepared in the preparation example. First, TEM images of gold core and core-shell structured metal nanoparticles were taken. TEM images of gold cores are shown in Figures 1(A) and 1(B), and TEM images of core-shell structured metal nanoparticles are shown in Figure 1(C). In addition, DLS analysis was performed on the core and core-shell particles, and the results are shown in Figure 2. Sample No. 4 was used as the analysis sample.

[0070] As a result of the experiment, it was confirmed that the gold core particles exhibited a uniform particle size of 11.3±2.7 nm overall and did not aggregate with each other, and the core-shell metal nanoparticles were formed as uniform particles of 42.3±5.3 nm.

[0072] [Experimental Example 2]

[0073] DLS analysis was performed on metal nanoparticles having a core-shell structure prepared in the preparation example, and the particle size according to the composition of the metal constituting the shell is shown in Fig. 3.

[0074] Looking at the experimental results, it was confirmed that the particle size hardly changed even when the shell composition changed.

[0076] [Experimental Example 3]

[0077] EDS analysis was performed on samples 1, 4, 8, and 10, and the results are shown in Fig. 4. In Fig. 4, light green represents silver (Ag) and red represents gold (Au). Additionally, TEM images were taken for each sample and are shown together with the EDS analysis results in the lower right corner.

[0078] Experimental results showed that as the specific gravity of silver increased, the color intensity of the gold core, indicated by red in the center, decreased; however, despite these compositional changes, there was no significant change in the overall size or shape of the metal nanoparticles. Through this, it was confirmed that changes in shell composition affect only optical properties and do not significantly affect morphological properties, making it possible to manufacture metal nanoparticles with stable and uniform properties even when the shell composition changes.

[0080] [Experimental Example 4]

[0081] The absorption spectra of the solutions containing core-shell metal nanoparticles of samples 1 to 11 prepared in the preparation examples were measured and are shown in Fig. 5, and the appearance of each solution was photographed and is shown together in Fig. 5. In addition, the local surface plasmon resonance (LSPR) peaks of each sample are shown in Fig. 6.

[0082] As a result of the experiment, the synthesized core-shell metal nanoparticles exhibited a diverse color spectrum ranging from purple to yellow. Unlike gold (520 nm) or silver (420 nm), which have a single peak, the core-shell metal nanoparticles of the present invention exhibited an LSPR peak from 400 to 542 nm. As the proportion of gold in the shell increased, a red shift occurred, and as the proportion of silver increased, a blue shift occurred. Through this, it was confirmed that the absorption peak of the metal nanoparticles can be controlled by changing the shell composition.

[0084] [Experimental Example 5]

[0085] The appearance of lenses 1 to 11 manufactured in the manufacturing example was photographed and is shown in FIG. 7. In addition, the transmittance of each lens was measured and normalized, and then shown as a graph in FIG. 8(A), and the range in which color filtering is possible for each lens (the area where the normalized transmittance is less than 15%) is shown in FIG. 8(B).

[0086] It was confirmed that the lenses with core-shell metal nanoparticles of samples 1 to 11 have an appearance as shown in Fig. 7.

[0087] In addition, the absorption peak of the lens with applied metal nanoparticles (approx. 419–577 nm) was slightly shifted compared to the absorption peak of the core-shell metal nanoparticles (approx. 400–545 nm), and on average, this shift resulted in a red shift of about 22 nm. However, this change does not reduce the efficiency of the metal nanoparticles' function of filtering specific wavelengths.

[0088] In addition, the region where the normalized transmittance is less than 15% is the region where wavelength filtering is possible for each lens, and as shown in Fig. 8(B), it was confirmed that the filterable region for each lens is slightly different. Various color blindness, including red-green color blindness and blue-yellow color blindness, is caused by abnormalities in L, M, and S cone photoreceptors that detect light of various wavelengths. Since these abnormalities in photoreceptors may vary from person to person, it was confirmed that by using a lens with the core-shell metal nanoparticles of the present invention, it is possible to provide a personalized color blindness correction lens by changing the metal composition within the shell.

[0089] For example, it was confirmed that in the case of red-green color blindness, it is desirable for the concentration of gold in the shell to be 40–100%, particularly 40–90%, and in the case of blue-yellow color blindness, it is desirable for the concentration of gold in the shell to be 0–30%, particularly 10–30%.

[0091] [Experimental Example 6]

[0092] The transmittance of lenses 2 and 10, measured earlier, and the transmittance of three cone cells (S-cone, M-cone, L-cone) are shown together in Fig. 9.

[0093] From the results in Fig. 9, the wavelength filtering effect in two types of color blindness (red-green color blindness and blue-yellow color blindness) resulting from three types of cone cell defects can be confirmed. In the case of lenses Sample 2 and 10, it can be confirmed that they exhibit a filtering effect of 80–85% at 490 nm and 550 nm, respectively.

[0095] [Experimental Example 7]

[0096] A commercial contact lens for color vision deficiency (for red-green color blindness) was prepared as a comparative example, and the transmittance of the lens of Sample 10 and the comparative example were compared and shown in Fig. 10. Although both lenses exhibited similar light transmittance in the target wavelength range, it was found that the lens of Sample 10 exhibited a narrower full width at half maximum (FWHM), allowing it to filter only the target wavelength range more selectively.

[0097] Therefore, it was confirmed that the color blindness correction lens of the present invention corrects color blindness by selectively filtering only specific wavelength ranges, and enables more normal color perception by exhibiting high light transmittance in other wavelength ranges.

[0099] [Experimental Example 8]

[0100] The appearance of the above comparative example and sample 10 lenses when worn on an actual eye was simulated using AI, and the results are shown in Fig. 11.

[0101] Referring to FIG. 11, the lens of the present invention appeared slightly gray in the center, showing no significant color difference from the pupil, whereas in the comparative example, the center of the lens where the pupil is located appeared red because a coloring agent was used.

[0102] Therefore, it was confirmed that wearing the colorblindness correction lens of the present invention allows for maintaining a more natural appearance than conventional colorblindness correction lenses.

[0103] The present invention is not limited to the specific embodiments and descriptions described above, and any person skilled in the art to which the invention pertains may make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications fall within the scope of protection of the present invention.

Claims

Claim 1 A lens composition comprising metal nanoparticles having a core-shell structure; wherein the core comprises one type of metal and the shell comprises two or more types of metals. Claim 2 A lens composition according to claim 1, characterized in that the core comprises gold, silver, platinum, aluminum, iron, zinc, copper, tin, bronze, brass, or nickel. Claim 3 A lens composition according to claim 1, wherein the shell comprises two or more metals selected from the group consisting of gold, silver, platinum, aluminum, iron, zinc, copper, tin, bronze, brass, or nickel. Claim 4 A lens composition according to claim 1, characterized in that the particle size of the core-shell structured metal nanoparticles is 30 to 50 nm. Claim 5 A lens composition according to claim 1, characterized in that the particle size of the core of the core-shell structure is 5 to 15 nm. Claim 6 A lens for color blindness correction, formed by curing a lens composition of any one of claims 1 to 5 or by coating it onto a lens substrate. Claim 7 In claim 6, the color blindness correction lens is a color blindness correction lens that has a color blindness correction effect by filtering visible light within a specific wavelength range. Claim 8 In claim 6, the color blindness correction lens is characterized in that the wavelength range filtered is controlled according to the type of metal included in the core. Claim 9 In claim 6, the color blindness correction lens is characterized in that the range of wavelengths filtered varies depending on the type and / or composition of the metal included in the shell. Claim 10 A colorblindness correction lens according to claim 6, characterized in that the colorblindness correction lens is a contact lens, or a lens used for eyeglasses, sunglasses, swimming goggles, or goggles.

Images