Ultraviolet and blue light protection contact lens and color-changing contact lens

Abstract

The utility model discloses a contact lens and a photochromic contact lens that are anti-ultraviolet and anti-blue light. The contact lens comprises a first lens layer, a second lens layer is concentrically arranged on the inner side of the first lens layer, and the outer surface of the second lens layer is in contact with the inner surface of the first lens layer; the first lens layer comprises a first optical zone and a first peripheral zone, and the second lens layer comprises a second optical zone and a second peripheral zone; the second optical zone is a transparent component cross-linked and cured with an ultraviolet absorber and a blue light absorber. The second optical zone of the contact lens facing the inner side of the human eye is a transparent component cross-linked and cured with an ultraviolet absorber and a blue light absorber; ultraviolet light and blue light can be filtered at the same time, reducing the problem of yellowing of existing contact lenses that filter ultraviolet light and blue light; the second optical zone of the photochromic contact lens is cross-linked and cured with a photochromic dye, and can filter strong light under outdoor conditions. The new type has a simple structure, is convenient and beautiful to wear, has high wearing comfort, and has a wide range of usage scenarios.

Description

Technical Field

[0001] The utility model relates to the technical field of contact lenses, and more specifically, to ultraviolet and blue light resistant contact lenses and color-changing contact lenses. Background Art

[0002] Corneal contact lenses, also known as contact lenses for short, are lenses worn on the cornea of ​​the human eye to correct vision or protect the human cornea. According to the function of contact lenses, they can be divided into several categories, such as ordinary transparent lenses, colored contact lenses or cosmetic contact lenses, bandage lenses, defocused soft lenses, etc. According to the hardness and softness of the contact lens material, they can also be divided into hard contact lenses and soft contact lenses. According to the different materials of contact lenses, they are divided into hydrogel contact lenses and silicone hydrogel contact lenses. Compared with traditional frame glasses, contact lenses not only bring a wide field of vision and realistic vision to the wearer, but also can bring great improvement to patients with refractive errors such as myopia, hyperopia, astigmatism, etc., and also play a special role in the prevention and control of myopia in adolescents and the treatment of ophthalmic diseases; moreover, contact lenses are more beautiful than frame glasses and do not affect sports. Therefore, contact lenses are increasingly used in myopia correction, prevention, and treatment of ophthalmic diseases.

[0003] In daily life, when the outdoor sunlight is strong, you need to wear sunglasses to reduce the light entering your eyes. When you enter a relatively dark environment, you need to take off your sunglasses, which is troublesome. In addition, there is short-wave light in the outdoor sunlight environment and in daily life. Some short-wave light, such as ultraviolet light (280-380nm) and harmful short-wave blue light (380-460nm), can cause damage to human eyes. If you are active outdoors under strong light for a long time, or use electronic products with screens for a long time, it is easy to cause eye damage.

[0004] The Chinese invention patent with publication number CN209215763U discloses a radiation-proof and light-filtering contact lens, whose lens has the function of UV protection and blue light protection, but the lens is yellow as a whole, which is not beautiful enough. At the same time, it is still necessary to wear sunglasses when using it under strong light outdoors to reduce the light entering the eyes, which is rather cumbersome; the Chinese utility model patent with publication number CN 214704209U discloses a photochromic contact lens, which realizes the photochromic sunglasses function by dividing the optical area into layers and arranging a color-changing layer between the two layers; but it does not have the function of filtering blue light and ultraviolet light. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a contact lens and a photochromic contact lens that are anti-ultraviolet and blue light. The contact lens can filter blue light and ultraviolet light at the same time, and the lens is colorless as a whole. The photochromic contact lens can not only photochromically reduce the light entering from the contact lens, acting as a pair of sunglasses, but also can filter blue light and ultraviolet light at the same time under indoor conditions.

[0006] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is:

[0007] A contact lens for preventing ultraviolet and blue light, comprising a first lens layer, a second lens layer being concentrically arranged inside the first lens layer, and an outer surface of the second lens layer being in contact with an inner surface of the first lens layer;

[0008] The first lens layer includes a first optical zone and a first peripheral zone, the second lens layer includes a second optical zone and a second peripheral zone, the first peripheral zone and the second peripheral zone are respectively arranged at the peripheral sides of the first optical zone and the second optical zone;

[0009] The second optical zone on the second lens layer is a transparent member with an ultraviolet absorber and a blue light absorber cross-linked and cured.

[0010] The utility model of the photochromic contact lens with protection against ultraviolet and blue light is provided with a contact lens having two layers, namely, a first lens layer and a second lens layer, wherein the second optical zone on the second lens layer facing the inner side of the human eye is a transparent component cross-linked and cured with an ultraviolet absorber and a blue light absorber. The second optical zone can filter ultraviolet and blue light at the same time, thereby reducing the yellowish appearance of the entire lens whether viewed from the front or side angles due to the ultraviolet absorber and the blue light absorber being integrally cured into the contact lens component or coated on the surface of the contact lens in a coating manner, thereby affecting the aesthetics of the contact lens.

[0011] A photochromic contact lens that protects against ultraviolet and blue light, comprising a first lens layer, a second lens layer being concentrically arranged inside the first lens layer, and an outer surface of the second lens layer being in contact with an inner surface of the first lens layer;

[0012] The first lens layer includes a first optical zone and a first peripheral zone, the second lens layer includes a second optical zone and a second peripheral zone, the first peripheral zone and the second peripheral zone are respectively arranged at the peripheral sides of the first optical zone and the second optical zone;

[0013] The second optical zone on the second lens layer is a transparent member cross-linked and cured with an ultraviolet absorber, a blue light absorber and a photochromic dye.

[0014] The utility model of the photochromic contact lens with protection against ultraviolet and blue light is provided by setting the contact lens into two layers, namely, a first lens layer and a second lens layer, wherein the second optical zone on the second lens layer facing the inner side of the human eye is a transparent component cross-linked and cured with ultraviolet absorber, blue light absorber and photochromic dye. The second optical zone can filter ultraviolet and blue light at the same time, reducing the yellowish appearance of the entire lens from the front or side angles caused by the ultraviolet absorber and blue light absorber being integrally cured into the contact lens component or coated on the contact lens surface in a coating manner, thereby affecting the appearance of the contact lens; and the contact lens can be photochromic under outdoor light, thereby reducing the intensity of light entering from the contact lens, and acting as a sunglasses effect.

[0015] Furthermore, a transparent and hydrophilic third lens layer may be concentrically arranged on the inner side of the second lens layer, the second lens layer is arranged between the first lens layer and the third lens layer, and is respectively bonded to the inner surface of the first lens layer and the outer surface of the third lens layer; the third lens layer includes a third optical zone and a third peripheral zone, the third peripheral zone is arranged on the peripheral side of the third optical zone; the inner surface of the third lens layer has the same curvature as that of the human eye.

[0016] Furthermore, the thickness of the second optical zone on the second lens layer is 0.005-0.070 mm.

[0017] Furthermore, the diameter of the first optical zone or the second optical zone is 5.00-10.00 mm.

[0018] Preferably, the diameters of the first optical zone and the second optical zone are the same, and are both 5.00-10.00 mm.

[0019] Preferably, the diameters of the first optical zone, the second optical zone and the third optical zone are the same, and are all 5.00-10.00 mm.

[0020] Furthermore, the first lens layer covers the outer side of the second lens layer, the diameter of the first lens layer is 13.80-15.00 mm, and the diameter of the first lens layer is the total diameter of the contact lens.

[0021] Furthermore, the diameter of the second lens layer is 7.00-12.00 mm.

[0022] Furthermore, the diameter of the third lens layer is 7.10-13.00 mm, and the third lens layer completely covers the second lens layer.

[0023] Furthermore, the inner surface of the first peripheral area or the outer surface of the second peripheral area is provided with a decorative beauty contact lens pattern area, and the beauty contact lens pattern area is not connected to the outside of the contact lens.

[0024] Furthermore, the inner surface of the first peripheral zone, the outer surface of the third peripheral zone, or the surface of the second peripheral zone is provided with a decorative beauty contact lens pattern zone, and the beauty contact lens pattern zone is not connected to the outside of the contact lens.

[0025] Furthermore, the second peripheral area of ​​the second lens layer is a transparent component cross-linked and cured with an ultraviolet absorber, a blue light absorber and a photochromic dye.

[0026] Furthermore, the photochromic contact lens is a hydrogel or silicone hydrogel contact lens.

[0027] The beneficial effects of the utility model are:

[0028] (1) The UV- and blue-light-proof contact lens and the photochromic contact lens provided by the utility model are configured as a first lens layer and a second lens layer, wherein the second optical zone on the second lens layer facing the inner side of the human eye is a transparent component cross-linked and cured with an UV absorber and a blue-light absorber, thereby filtering UV light and blue light at the same time, thereby avoiding the problem that the entire lens can be seen as yellowish from the front or side angles due to the UV absorber and the blue-light absorber being integrally cured into the contact lens component, and making the lens more beautiful to wear.

[0029] (2) The UV- and blue-light-resistant photochromic contact lens provided by the utility model is configured by setting the contact lens as a first lens layer and a second lens layer, wherein the second optical zone on the second lens layer facing the inner side of the human eye is a transparent component cross-linked and cured with a UV absorber and a blue-light absorber photochromic dye; it can photochromatically change under outdoor light, reduce the intensity of light entering from the contact lens, and act as a pair of sunglasses.

[0030] (3) The contact lenses provided by the present invention can filter blue light and ultraviolet light at the same time. The photochromic contact lenses can achieve photochromism and filter blue light and ultraviolet light at the same time, and have a simple structure, are easy and comfortable to wear, and have a wide range of usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the front view of the first structure of the UV and blue light protection contact lens and the photochromic contact lens.

[0032] Figure 2 The cross-sectional structure diagram of the first structure of the UV and blue light protection contact lens and the photochromic contact lens is shown in FIG.

[0033] Figure 3 This is a schematic diagram of the frontal viewing angle structure of the second structure of the photochromic contact lens for protection against ultraviolet and blue light.

[0034] Figure 4 This is a schematic cross-sectional view of the second structure of the photochromic contact lens that protects against ultraviolet and blue light.

[0035] The figure numbers are as follows: 1 is the first lens layer; 11 is the first optical zone; 12 is the first peripheral zone; 2 is the second lens layer; 21 is the second optical zone; 22 is the second peripheral zone; 3 is the third lens layer; 31 is the third optical zone; 32 is the third peripheral zone; D1 represents the diameter of the second optical zone; D2 represents the diameter of the second lens layer; D3 represents the diameter of the first lens layer; D4 represents the diameter of the third lens layer. DETAILED DESCRIPTION

[0036] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. In order to make the content of the utility model easier to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model.

[0037] Example 1

[0038] A contact lens that blocks UV and blue light, such as Figure 1 and Figure 2 As shown, it includes a first lens layer 1, a second lens layer 2 is concentrically arranged on the inner side of the first lens layer 1, and the outer surface of the second lens layer 2 is in contact with the inner surface of the first lens layer 1; the first lens layer 1 includes a first optical zone 11 and a first peripheral zone 12, the second lens layer 2 includes a second optical zone 21 and a second peripheral zone 22, the first peripheral zone 12 and the second peripheral zone 22 are respectively arranged on the peripheral sides of the first optical zone 11 and the second optical zone 21; the second optical zone 21 on the second lens layer 2 is a transparent component cross-linked and cured with an ultraviolet absorber and a blue light absorber.

[0039] In order to further improve the absorption effect of ultraviolet and blue light, when the user wears the contact lens, the inner surface of the second lens layer 2 contacts the user's eyes, specifically, the optical center of the human eye coincides with the optical center of the contact lens. Under this condition, as an optional solution, its specific dimensions are as follows:

[0040] The first lens layer 1 covers the outer side of the second lens layer 2, and the diameter D3 of the first lens layer 1 is 13.80-15.00 mm. In this embodiment, the diameter D3 of the first lens layer 1 is preferably 14.20 mm. The thickness of the second optical zone 21 on the second lens layer 2 is 0.005-0.070 mm. In this embodiment, the thickness of the second optical zone 21 on the second lens layer 2 is preferably 0.030 mm. The diameter D1 of the first optical zone 11 or the second optical zone 21 is 5.00-10.00 mm. In this embodiment, the diameter 11 of the first optical zone and the diameter D1 of the second optical zone 21 are preferably the same, and both are 7.20 mm. The diameter D2 of the second lens layer 2 is 7.00-12.00 mm. In this embodiment, the diameter D2 of the second lens layer 2 is preferably 8.00 mm.

[0041] As an optional solution, the contact lens is a hydrogel contact lens or a silicone hydrogel contact lens, that is, the first lens layer 1 and the second lens layer 2 are mainly composed of hydrogel or silicone hydrogel. Hydrogel or silicone hydrogel has certain hydrophilicity and oxygen permeability, so they are two commonly used raw materials for contact lenses; as an optional solution, the ultraviolet absorber is a benzotriazole and benzophenone ultraviolet absorber, and this embodiment uses 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl-2-methylacrylate; the blue light absorber is an azophenyl ester ultraviolet absorber, such as 4-[(E)-phenyldiazenyl]2-methylacrylate, 2-[4-[(E)-phenyldiazenyl]phenoxyethyl]-2-acrylate, etc., and this embodiment uses 4-[(E)-phenyldiazenyl]2-methylacrylate. The ultraviolet absorber and blue light absorber are commonly used in the art, and the utility model relates to this part as commonly used in the art, and does not involve improvements to the material itself.

[0042] In a specific implementation process, when a user wears the present contact lens, the present UV- and blue-light-proof contact lens can be taken to make the inner surface of the second lens layer 2 contact the user's eyes. At this time, light can be irradiated to the second optical zone 21 through the first optical zone 11. The second optical zone 21 can absorb ultraviolet and blue light, reduce the ultraviolet and blue light entering the retina, and avoid damage to the retina due to ultraviolet and blue light, as well as strong light irradiation. When looking at the eyes of the user wearing the present contact lens from the front, the first peripheral zone 12 and the second peripheral zone 22 are both transparent, which does not affect the wearing appearance. When looking at the eyes of the user wearing the present contact lens from the side, since the present contact lens has a two-layer structure, the first lens layer 1 located on the outside of the eye when worn is transparent, and therefore does not affect the side appearance of the eye.

[0043] The utility model anti-ultraviolet and blue light contact lens is provided with two layers of a first lens layer 1 and a second lens layer 2, and the second optical zone 21 on the second lens layer 2 facing the inner side of the human eye is a transparent component cross-linked and cured with an ultraviolet absorber and a blue light absorber. The second optical zone 21 can filter ultraviolet light and blue light at the same time, reducing the yellowish appearance of the entire lens from the front or side angles caused by the ultraviolet absorber and the blue light absorber being integrally cured into the contact lens component, thereby affecting the appearance of the contact lens; the anti-ultraviolet and blue light color-changing contact lens provided by the utility model can filter blue light and ultraviolet light at the same time, has a simple structure, is easy and comfortable to wear, and has a wide range of usage scenarios.

[0044] Example 2

[0045] A photochromic contact lens that protects against ultraviolet and blue light, such as Figure 1 and Figure 2 As shown, it includes a first lens layer 1, a second lens layer 2 is concentrically arranged on the inner side of the first lens layer 1, and the outer surface of the second lens layer 2 is in contact with the inner surface of the first lens layer 1; the first lens layer 1 includes a first optical zone 11 and a first peripheral zone 12, the second lens layer 2 includes a second optical zone 21 and a second peripheral zone 22, and the first peripheral zone 12 and the second peripheral zone 22 are respectively arranged on the peripheral sides of the first optical zone 11 and the second optical zone 21; the second optical zone 21 on the second lens layer 2 is a transparent component cross-linked and cured with an ultraviolet absorber, a blue light absorber and a photochromic dye.

[0046] In order to further enhance the absorption effect of ultraviolet and blue light and the photochromic effect, when the user wears the contact lens, the inner surface of the second lens layer 2 contacts the user's eyes, specifically, the optical center of the human eye coincides with the optical center of the contact lens. Under this condition, as an optional solution, its specific dimensions are as follows:

[0047] The first lens layer 1 covers the outer side of the second lens layer 2, and the diameter D3 of the first lens layer 1 is 13.80-15.00 mm. In this embodiment, the diameter D3 of the first lens layer 1 is preferably 14.20 mm. The thickness of the second optical zone 21 on the second lens layer 2 is 0.005-0.070 mm. In this embodiment, the thickness of the second optical zone 21 on the second lens layer 2 is preferably 0.030 mm. The diameter D1 of the first optical zone 11 or the second optical zone 21 is 5.00-10.00 mm. In this embodiment, the diameter 11 of the first optical zone and the diameter D1 of the second optical zone 21 are preferably the same, and both are 7.20 mm. The diameter D2 of the second lens layer 2 is 7.00-12.00 mm. In this embodiment, the diameter D2 of the second lens layer 2 is preferably 8.00 mm.

[0048] As an optional scheme, the contact lens is a hydrogel contact lens or a silicone hydrogel contact lens, that is, the first lens layer 1 and the second lens layer 2 are mainly composed of hydrogel or silicone hydrogel. Hydrogel or silicone hydrogel has certain hydrophilicity and oxygen permeability, so they are two commonly used raw materials for contact lenses; as an optional scheme, the ultraviolet absorber is a benzotriazole and benzophenone ultraviolet absorber, and this embodiment uses 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl-2-methylacrylate; the blue light absorber is an azophenyl ester ultraviolet absorber, such as 4-[(E)-phenyldiazenyl]2-methylacrylate, 2-[4-[(E)-phenyldiazenyl]phenoxyethyl]-2-acrylate, etc., and this embodiment uses 4-[(E)-phenyldiazenyl]2-methylacrylate; the photochromic dye is a commonly used polymerizable naphthopyran, spiropyran and spirooxazine. The ultraviolet absorber, blue light absorber and photochromic dye are commonly used in the art. The utility model relates to the parts commonly used in the art and does not involve improvements to the materials themselves.

[0049] In a specific implementation process, when a user wears the present contact lens, the present anti-ultraviolet and blue light photochromic contact lens can be taken, and the inner surface of the second lens layer 2 can be brought into contact with the user's eyes. At this time, light can be irradiated to the second optical zone 21 through the first optical zone 11. The second optical zone 21 can absorb ultraviolet and blue light, and can photochromicize under outdoor light, thereby reducing the light intensity entering the retina, reducing the entry of ultraviolet and blue light into the retina, and avoiding damage to the retina due to ultraviolet and blue light, as well as strong light irradiation. When looking at the eyes of a user wearing the present contact lens from the front, the first peripheral zone 12 and the second peripheral zone 22 are both transparent, and do not affect the wearing appearance. When looking at the eyes of a user wearing the present contact lens from the side, since the present contact lens has a two-layer structure, the first lens layer 1 located on the outside of the eye when worn is transparent, and therefore does not affect the side appearance of the eye.

[0050] The photochromic contact lens with UV protection and blue light protection of the utility model is provided with two layers of the first lens layer 1 and the second lens layer 2, and the second optical zone 21 on the second lens layer 2 facing the inner side of the human eye is a transparent component cross-linked and cured with UV absorber, blue light absorber and photochromic dye. The second optical zone 21 can filter UV light and blue light at the same time, reducing the yellowish lens that can be seen from the front or side angles due to the UV absorber and blue light absorber being integrally cured into the contact lens component, thereby affecting the appearance of the contact lens; and it can photochromic in outdoor light, reducing the intensity of light entering from the contact lens, and acting as a sunglasses. The photochromic contact lens with UV protection and blue light protection provided by the utility model can achieve photochromic change and filter blue light and UV light at the same time, has a simple structure, is easy and comfortable to wear, and has a wide range of usage scenarios.

[0051] Example 3

[0052] In order to further enhance the effective protection of the contact lens and the photochromic contact lens for the eye area corresponding to the second peripheral zone 22, on the basis of Example 1 or Example 2, as an optional scheme, the second peripheral zone 22 of the second lens layer 2 is set to be cross-linked and cured with ultraviolet absorbers and blue light absorbers; according to actual needs, the second peripheral zone 22 of the second lens layer 2 can also be set as a transparent component cross-linked and cured with ultraviolet absorbers, blue light absorbers and photochromic dyes for photochromic contact lenses.

[0053] The second peripheral area 22 is set as the transparent component, which can provide protection for the corresponding eye part from ultraviolet and blue light damage. For the photochromic contact lens, photochromism can be achieved to reduce the light intensity entering the corresponding eye part. After the second peripheral area 22 is set as a transparent component cross-linked and cured with ultraviolet absorber and blue light absorber or ultraviolet absorber, blue light absorber and photochromic dye, it is equivalent to the second lens layer 2 being the entire transparent component. When the user's eyes of the contact lens are observed from the side, since the first lens layer 1 is located on the outside of the contact lens, the transparent first lens layer 1 is mainly seen, which does not affect the beauty of the user's eyes when wearing the contact lens.

[0054] Example 4

[0055] In order to further improve the wearing comfort of the contact lens, based on the color-changing contact lens of Example 2, Figure 3 and Figure 4 , a transparent and hydrophilic third lens layer 3 is concentrically arranged inside the second lens layer 2, the second lens layer 2 is arranged between the first lens layer 1 and the third lens layer 3, and is respectively attached to the inner surface of the first lens layer 1 and the outer surface of the third lens layer 3; the third lens layer 3 includes a third optical zone 31 and a third peripheral zone 32, the third peripheral zone 32 is arranged on the peripheral side of the third optical zone 31; the inner surface of the third lens layer 3 has the same curvature as the human eye. Setting the third lens layer 3 as a transparent and more hydrophilic component with the same curvature as the human eye can maximize the wearing comfort.

[0056] As an optional solution, the diameter of the first optical zone 11, the diameter D1 of the second optical zone 21 and the diameter of the third optical zone 31 are the same and are all 5.00-10.00 mm, preferably 7.20 mm in this embodiment; the diameter D4 of the third lens layer 3 is 7.10-13.00 mm, preferably 9.00 mm in this embodiment, and the third lens layer 3 should completely cover the second lens layer 2 so that it is between the first lens layer 1 and the third lens layer 3.

[0057] Example 5

[0058] In order to further realize the beauty of the contact lenses and to provide the contact lenses with photochromic functions, based on the contact lenses of Example 1 and the photochromic contact lenses of Example 2, a decorative contact lens pattern area is provided on the inner surface of the first peripheral area 12 or the outer surface of the second peripheral area 22, and the contact lens pattern area is not connected to the outside of the contact lens. As an optional solution, based on Example 4, a decorative contact lens pattern area is provided on the inner surface of the first peripheral area 12 or the outer surface of the third peripheral area 32 or the surface of the second peripheral area 22, and the contact lens pattern area is not connected to the outside of the contact lens.

[0059] In the specific implementation process, as long as the cosmetic contact lens pattern area in the above scheme is a peripheral area set outside the optical area and is not connected to the outside of the contact lens, it can prevent the overflow of the dye in the cosmetic contact lens pattern from causing damage to the eyes.

[0060] With respect to the above embodiments, it should be noted that the transparent components involved in the above embodiments 1-5 are prepared by the existing technology in the field, which is clear and easy to implement for those skilled in the art, and there is no improvement on the materials. Cross-linking and curing are also commonly used technical means in the field. Compared with the addition of ultraviolet absorbers, blue light absorbers and photochromic dyes to the coating in the prior art, the difference is that the ultraviolet absorbers, blue light absorbers and photochromic dyes are cross-linked and cured with the optical part of the contact lens body, rather than the coating. The coating is a thin layer, which is applied on the surface of the lens, is relatively more concentrated, the combination is not stable enough, and it is easy to overflow. The second optical zone 21 in the cross-linked and cured second lens layer 2 of the utility model can provide filtering of ultraviolet and blue light, and at the same time, it is targeted at photochromic contact lenses and can be photochromic under outdoor light, does not affect the overall aesthetics of the lens, and improves the wearing comfort, so it will not be described in detail here.

[0061] The above description is only a preferred embodiment of the present utility model patent and does not constitute a limitation of the present utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model patent shall be included in the protection scope of the present utility model patent.

Claims

1. A contact lens that protects against ultraviolet and blue light, characterized in that: It comprises a first lens layer (1), a second lens layer (2) is concentrically arranged inside the first lens layer (1), and the outer surface of the second lens layer (2) is in contact with the inner surface of the first lens layer (1); The first lens layer (1) comprises a first optical zone (11) and a first peripheral zone (12); the second lens layer (2) comprises a second optical zone (21) and a second peripheral zone (22); the first peripheral zone (12) and the second peripheral zone (22) are respectively arranged on the peripheral sides of the first optical zone (11) and the second optical zone (21); The second optical zone (21) on the second lens layer (2) is a transparent component with an ultraviolet absorber and a blue light absorber cross-linked and cured.

2. A photochromic contact lens that protects against ultraviolet and blue light, characterized in that: It comprises a first lens layer (1), a second lens layer (2) is concentrically arranged inside the first lens layer (1), and the outer surface of the second lens layer (2) is in contact with the inner surface of the first lens layer (1); The first lens layer (1) comprises a first optical zone (11) and a first peripheral zone (12); the second lens layer (2) comprises a second optical zone (21) and a second peripheral zone (22); the first peripheral zone (12) and the second peripheral zone (22) are respectively arranged on the peripheral sides of the first optical zone (11) and the second optical zone (21); The second optical zone (21) on the second lens layer (2) is a transparent component with cross-linked and cured ultraviolet absorber, blue light absorber and photochromic dye.

3. The photochromic contact lens with UV and blue light protection according to claim 2, characterized in that: A transparent and hydrophilic third lens layer (3) is concentrically arranged on the inner side of the second lens layer (2); the second lens layer (2) is arranged between the first lens layer (1) and the third lens layer (3), and is respectively bonded to the inner surface of the first lens layer (1) and the outer surface of the third lens layer (3); the third lens layer (3) comprises a third optical zone (31) and a third peripheral zone (32); the third peripheral zone (32) is arranged on the peripheral side of the third optical zone (31); the inner surface of the third lens layer (3) has the same curvature as that of a human eye.

4. The UV and blue light blocking contact lens according to claim 1 or the UV and blue light blocking photochromic contact lens according to claim 2, characterized in that: The thickness of the second optical zone (21) on the second lens layer (2) is 0.005-0.070 mm.

5. The UV and blue light blocking contact lens according to claim 1 or the UV and blue light blocking photochromic contact lens according to claim 2, characterized in that: The diameter of the first optical zone (11) or the second optical zone (21) is 5.00-10.00 mm.

6. The UV and blue light blocking contact lens according to claim 1 or the UV and blue light blocking photochromic contact lens according to claim 2, characterized in that: The first lens layer (1) covers the outer side of the second lens layer (2), and the diameter of the first lens layer (1) is 13.80-15.00 mm.

7. The ultraviolet and blue light blocking contact lens according to claim 1 or the ultraviolet and blue light blocking photochromic contact lens according to claim 2, characterized in that: The diameter of the second lens layer (2) is 7.00-12.00 mm.

8. The photochromic contact lens with protection against ultraviolet and blue light according to claim 3, characterized in that: The diameter of the third lens layer (3) is 7.10-13.00 mm, and the third lens layer (3) completely covers the second lens layer (2).

9. The UV and blue light blocking contact lens according to claim 1 or 2 or the UV and blue light blocking photochromic contact lens according to claim 2, characterized in that: The inner surface of the first peripheral area (12) or the outer surface of the second peripheral area (22) is provided with a decorative cosmetic lens pattern area, and the cosmetic lens pattern area is not connected to the outside of the contact lens.

10. The photochromic contact lens with UV and blue light protection according to claim 3, characterized in that: The inner surface of the first peripheral zone (12) or the outer surface of the third peripheral zone (32) or the surface of the second peripheral zone (22) is provided with a decorative beauty pupil pattern area, and the beauty pupil pattern area is not connected to the outside of the contact lens.

11. The UV- and blue-light-blocking contact lens according to claim 1 or the UV- and blue-light-blocking photochromic contact lens according to claim 2, characterized in that: The second peripheral area (22) of the second lens layer (2) is a transparent component cross-linked and cured with an ultraviolet absorber, a blue light absorber and a photochromic dye.

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