Manufacturing method of myopia prevention and control lens and myopia prevention and control lens

Abstract

The application relates to a manufacturing method of myopia prevention control lenses and the myopia prevention control lenses, wherein the manufacturing method comprises the following steps: S1, pretreating a first curve of a lens body facing an eye; S2, coating a photoresist layer on the first curve; S3, covering a photo mask on the photoresist layer, and performing exposure treatment on the photoresist layer through light; and S4, washing and removing the photoresist layer through a developing solution to form a light diffusion zone. The myopia prevention control lens comprises a lens body, the lens body is provided with a first curve facing an eye and a second curve facing away from the eye; the first curve is provided with a clear vision zone and a light diffusion zone surrounding the clear vision zone, and the beneficial effect is that the clear vision zone effectively corrects vision, the light diffusion zone accurately realizes contrast reduction of different levels with high precision, the smoothness of the lens surface is higher, the projection effect of the lens on light is better, and the appearance is more beautiful.

Description

Technical Field

[0001] This invention relates to the field of lens technology, and in particular to a method for manufacturing a myopia control lens and the myopia control lens itself. Background Technology

[0002] Myopia is a refractive state in which parallel light rays, after being refracted by the eye's refractive system, focus in front of the retina. Therefore, myopic eyes cannot see distant objects clearly. If an object is gradually moved closer to the eye, the emitted light rays diverge to a certain extent, causing the focal point to shift backward. The closer the object is to a point in front of the eye, the more severe the myopia. Currently, no single theory can explain all the questions surrounding the causes and control mechanisms of myopia; all have certain limitations. In daily life, people spend increasingly more time using electronic devices with screens such as mobile phones and computers. While their bright and detailed images provide a good visual experience, their high contrast can stimulate axial elongation and affect vision. Therefore, reducing contrast provides a new approach to myopia prevention and control, and its feasibility has been clinically proven.

[0003] Currently, the most commonly used myopia control lenses are defocus lenses. These lenses utilize the principle of myopia defocus, correcting central refractive errors while simultaneously using peripheral relative positive power to correct peripheral retinal hyperopic defocus in myopic eyes. This inhibits axial elongation and myopia progression induced by peripheral retinal hyperopic defocus, thus slowing down the progression of vision loss. However, traditional defocus lenses cannot alter the contrast of the image on the retina, making their myopia control effect less than ideal for everyday environments.

[0004] Therefore, there is an urgent need for a manufacturing method and a myopia control lens that can reduce retinal imaging contrast. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a myopia control lens that solves the technical problem that the prior art cannot reduce contrast and has an unsatisfactory myopia control effect.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] On one hand, the present invention provides a method for manufacturing a myopia control lens, comprising the steps of:

[0010] S1. Pre-process the first curved surface of the lens body facing the eye.

[0011] S2. Coat the first curved surface with a photoresist layer.

[0012] S3. Cover the photomask onto the photoresist layer and expose the photoresist layer with light.

[0013] S4. The photoresist layer is washed away with a developing solution to form a light diffusion region.

[0014] Optionally, the size of the hole reserved in the photomask in step S3 matches the size of the diffusion point in the light diffusion region, and the size of the hole reserved in the photomask is 0.1 to 0.5 mm.

[0015] Optionally, S1 includes:

[0016] S11. Perform chemical cleaning and ultrasonic cleaning on the first curved surface.

[0017] S12. Dry the first curved surface after cleaning.

[0018] Optionally, S2 includes:

[0019] S21. A uniform photoresist base film is formed on the first curved surface by applying a base coat through a hot plate.

[0020] S22. The lens body is driven to rotate at a constant speed by a rotating mechanism, and photoresist is dropped onto the photoresist base film. Then, the lens body is driven to rotate at an accelerated speed by the rotating mechanism, so that the photoresist is evenly diffused to form the photoresist layer.

[0021] S23. Keep the lens body rotating at a constant speed to remove the edge protrusions of the photoresist layer.

[0022] Optionally, S2 further includes:

[0023] S24. The photoresist layer is baked in an oven at a temperature of 50°C to 90°C.

[0024] S25. Cool the baked photoresist layer to room temperature.

[0025] Optionally, the manufacturing method further includes:

[0026] S5. Perform hard film baking on the light diffusion area to remove residual developer.

[0027] On the other hand, the present invention provides a myopia control lens manufactured by the above method, comprising the lens body, wherein the lens body has a first curved surface facing the eye and a second curved surface facing away from the eye; the first curved surface is provided with a clear vision zone and a light diffusion zone surrounding the clear vision zone; the diameter of the diffusion point of the light diffusion zone is α, the value of α is in the range of 0.1 to 0.5 mm, and the distance between two diffusion points is d = Δ2 + α, where Δ = 0.4 to 0.8 mm.

[0028] Optionally, the first curved surface is further provided with a defocus area, which is arranged to overlap with the light diffusion area.

[0029] Optionally, the light diffusion area includes multiple point diffusion bands that diffuse outward from the center of the visible area, and the multiple diffusion points form a circular point diffusion band around the visible area.

[0030] Optionally, the area of ​​the light diffusion region is larger than the area of ​​the defocus region.

[0031] Optionally, the lens body is a convex lens or a concave lens.

[0032] Optionally, the visible area is circular in shape with a diameter of 3 to 6 mm.

[0033] (III) Beneficial Effects

[0034] The beneficial effects of this invention are:

[0035] The present invention provides a method for manufacturing a myopia control lens. By using photolithography to form a light diffusion area on the lens body, higher precision diffusion points can be created. With the precise diameter of each diffusion point and the more precise spacing between two adjacent diffusion points, different levels of contrast reduction can be achieved more accurately. Moreover, the lens surface has a higher smoothness and is more aesthetically pleasing.

[0036] This invention provides a myopia control lens that effectively corrects vision and ensures normal vision by refracting light onto the retina through a bright vision zone. A light diffusion zone reduces the contrast and brightness of the image projected onto the retina, minimizing color differences and thus achieving myopia control. The precise dimensions of the diffusion points and their spacing within the light diffusion zone, along with their relationship, ensure effective contrast reduction while meeting different retinal contrast reduction requirements. Compared to existing technologies, this lens effectively corrects vision through the bright vision zone while precisely achieving different levels of contrast reduction through the high-precision light diffusion zone. This results in a smoother lens surface, better light projection, and a more aesthetically pleasing appearance. Attached Figure Description

[0037] Figure 1This is a schematic diagram of the overall structure of a myopia control lens according to Embodiment 1 of the present invention;

[0038] Figure 2 yes Figure 1 Enlarged view of point A;

[0039] Figure 3 This is a flowchart illustrating the manufacturing process of the myopia control lens in Embodiment 2 of the present invention;

[0040] Figure 4 This is a schematic diagram of the manufacturing process of the myopia control lens in Embodiment 2 of the present invention.

[0041] [Explanation of Labels in the Attached Image]

[0042] 1: Lens body; 11: First curved surface;

[0043] 2: Visible area;

[0044] 3: Light diffusion region; 31: Diffusion point; 32: Diffusion band;

[0045] 4: Photoresist layer. Detailed Implementation

[0046] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0047] Example 1:

[0048] like Figures 1-2 As shown, a specific embodiment of the present invention provides a myopia control lens, including a lens body 1. The lens body 1 has a first curved surface 11 facing the eye and a second curved surface facing away from the eye. The first curved surface 11 is provided with a clear vision zone 2 and a light diffusion zone 3 surrounding the clear vision zone 2. The diameter of the diffusion point 31 in the light diffusion zone 3 is α, and the value of α ranges from 0.1 to 0.5 mm. The distance between two diffusion points 31 is d = Δ 2 +α, Δ = 0.4~0.8mm. In this embodiment, the visible area 2 is circular in shape with a diameter of 3~6mm.

[0049] Specifically, the visible zone 2 on the lens refracts light onto the retina, effectively correcting vision and ensuring normal line of sight. The light diffusion zone 3 reduces the contrast and brightness of the image projected onto the retina, minimizing hue differences and thus achieving myopia control. The precise diffusion points 31 and spacing of the light diffusion zone 3, along with their relationship, ensure contrast reduction while meeting the retinal contrast reduction requirements in various situations. Compared to existing technologies, this technology effectively corrects vision through the visible zone 2 while precisely achieving different levels of contrast reduction through the high-precision light diffusion zone 3, resulting in a smoother lens surface, better light projection, and a more aesthetically pleasing appearance.

[0050] Furthermore, in this embodiment, based on the contrast reduction effect of the diffusion point 31 diameter and the dot spacing, it is divided into three levels: mild reduction, moderate reduction, and high reduction, respectively, to adapt to the retinal contrast reduction requirements of different situations.

[0051] It is generally recommended to choose a slight reduction for diopter less than -3.00D: the diameter α of the diffusion point 31 should range from 0.1 to 0.3 mm, and the distance d between two adjacent diffusion points 31 should be Δ. 2 +α, Δ=0.4~0.8mm.

[0052] For diopter reduction between -3.00D and -6.00D, a moderate reduction is selected: the diameter α of the diffusion point 31 ranges from 0.2 to 0.4 mm, and the distance d between two adjacent diffusion points 31 is Δ. 2 +α, Δ=0.4~0.8mm.

[0053] For diopter greater than -6.00D, the height should be reduced: the diameter α of diffuser point 31 ranges from 0.3 to 0.5 mm, and the distance d between two adjacent diffuser points 31 is Δ. 2 +α, Δ=0.4~0.8mm.

[0054] This can more effectively improve the effect of light diffusion zone 3, but everyone's glasses are different, and doctors or optometrists will choose the appropriate level based on the refractive power and axial length of the eye.

[0055] Furthermore, such as Figures 1-2As shown, the first curved surface 11 also has a defocus area (not shown), which overlaps with the light diffusion area 3. In this embodiment, the area of ​​the light diffusion area 3 is larger than the area of ​​the defocus area. Specifically, the defocus area includes multiple defocus points, which form a defocus band around the visual field 2. The multiple defocus bands are distributed from the inside out with the visual field 2 as the center. The light diffusion area 3 includes multiple point diffusion bands 32 that diffuse from the inside out with the visual field 2 as the center. Multiple diffusion points 31 form a circular point diffusion band 32 around the visual field 2, thereby effectively ensuring that the contrast of the refracted light at various positions on the lens body 1 is consistent. The multiple defocus bands and multiple point diffusion bands 32 are distributed alternately from the inside out with the visual field 2 as the center. Part of the light in front of the line of sight enters the visual field 2, is refracted by the visual field 2 and focused on the retina, while the other part passes through the light diffusion area 3 to reduce the contrast. Together with the defocus area, it is focused in front of the retina, which can effectively suppress the deepening of vision.

[0056] Furthermore, such as Figures 1-3 As shown, in this embodiment, multiple diffusion points 31 uniformly surround the visual field 2 to form a circular diffusion band 32, and multiple defocus points uniformly surround the visual field 2 to form a circular defocus band. The shape of the defocus band can also be a regular polygon, with multiple regular polygonal defocus bands spreading outwards from the visual field 2 to form a regular polygonal defocus area. Furthermore, in this embodiment, the defocus degree of the defocus band increases sequentially from the inside to the outside, better conforming to the retinal structure of the eye, ensuring both defocusing effect and good wearing comfort.

[0057] Example 2:

[0058] This embodiment provides a method for manufacturing the myopia control lens described in Embodiment 1, wherein high-precision optical modulation micro-nano lithography is used to perform photolithography on the lens body 1, such as... Figure 3 and Figure 4 As shown, the steps include:

[0059] S1. Pre-process the first curved surface of the lens body facing the eye.

[0060] S2. Coat the first curved surface with a photoresist layer to enhance the adhesion between the photoresist and the first curved surface.

[0061] S3. A photomask is placed over the photoresist layer, and the photoresist layer is exposed to light. The size of the holes in the photomask matches the size of the diffusion points in the light diffusion region; specifically, the size of the holes in the photomask is 0.1–0.5 mm, and the distance between two adjacent holes is 0.4–0.8 mm. 2+0.1~0.5mm. For example, when manufacturing lenses for slightly reduced myopia control, the pre-drilled holes in the photomask are 0.1~0.3mm in size, and the spacing between two adjacent holes is (0.4~0.8mm). 2 +0.1~0.5mm.

[0062] S4. The photoresist layer is washed away with developer to form a light diffusion region.

[0063] S5. Perform hard film baking on the light diffusion area to remove residual developer.

[0064] Specifically, step S1 includes:

[0065] S11. Perform chemical cleaning and ultrasonic cleaning on the first curved surface to remove dirt and water vapor from the surface of the first curved surface.

[0066] S12. Drying the first curved surface after cleaning can help enhance the adhesion between the photoresist and the first curved surface.

[0067] Step S2 includes:

[0068] S21. By applying a base coat through a hot plate, a uniform photoresist base film is formed on the first curved surface, improving the adhesion between the photoresist and the first curved surface.

[0069] S22. The lens body is driven to rotate at a constant speed by the rotating mechanism, and photoresist is dropped onto the photoresist base film. Then, the lens body is driven to rotate faster by the rotating mechanism, so that the photoresist is evenly diffused to form a photoresist layer.

[0070] S23. Keep the lens body rotating at a constant speed to remove the edge protrusions of the photoresist layer.

[0071] S24. The photoresist layer is baked in an oven at a temperature of 50℃~90℃. The purpose is to remove the solvent from the photoresist, enhance adhesion, release the internal stress of the photoresist film, and prevent the photoresist from contaminating the lens.

[0072] S25. Cool the baked photoresist layer to room temperature to ensure development speed and high contrast.

[0073] Therefore, the manufacturing method provided in this embodiment can create more precise diffusion points by forming a light diffusion area on the lens body through photolithography. With the precise diameter of each diffusion point and the more precise spacing between two adjacent diffusion points, different levels of contrast reduction can be achieved more accurately. Moreover, the surface of the lens is smoother and more aesthetically pleasing.

[0074] Example 3:

[0075] This embodiment provides a pair of eyeglasses, including the myopia control lens described in Embodiment 1.

[0076] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0079] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for manufacturing myopia control lenses, characterized in that, Including the following steps: S1. Pre-process the first curved surface of the lens body facing the eye; S2. Coat the first curved surface with a photoresist layer; S3. Cover the photomask onto the photoresist layer and expose the photoresist layer with light; The size of the holes pre-drilled on the photomask is α, where α ranges from 0.1 to 0.5 mm, and the distance between two adjacent holes is d = Δ. 2 +α, Δ=0.4~0.8mm; where, when the refractive power is less than -3.00D, the size α of the hole reserved on the photomask is 0.1~0.3mm; when the refractive power is between -3.00D and -6.00D, the size α of the hole reserved on the photomask is 0.2~0.4mm; when the refractive power is greater than -6.00D, the size α of the hole reserved on the photomask is 0.3~0.5mm. S4. The photoresist layer is washed away with a developing solution to form a light diffusion region; S5. Perform hard film baking on the light diffusion area to remove residual developer; S2 includes: S21. A uniform photoresist base film is formed on the first curved surface by applying a base coat through a hot plate. S22. The lens body is driven to rotate at a constant speed by the rotating mechanism, and photoresist is dropped onto the photoresist base film. Then, the lens body is driven to rotate at an accelerated speed by the rotating mechanism, so that the photoresist is evenly diffused to form the photoresist layer. S23. Keep the lens body rotating at a constant speed to remove the edge protrusions of the photoresist layer; S24. The photoresist layer is baked in an oven at a temperature of 50°C to 90°C. S25. Cool the baked photoresist layer to room temperature.

2. A myopia control lens prepared by the manufacturing method of claim 1, characterized in that, Includes the lens body (1), which has a first curved surface (11) facing the eye and a second curved surface facing away from the eye; The first curved surface (11) is provided with a clear viewing area (2) and a light diffusion area (3) surrounding the clear viewing area (2); the light diffusion area (3) includes a plurality of point diffusion bands (32) that diffuse from the inside to the outside with the clear viewing area (2) as the center, and the plurality of diffusion points (31) form a circular point diffusion band (32) around the clear viewing area (2). The diameter of the diffusion point (31) in the light diffusion region (3) is α, and the value of α ranges from 0.1 to 0.5 mm. The distance between two diffusion points (31) is d = Δ. 2 +α, Δ=0.4~0.8mm; Wherein, when the refractive power is less than -3.00D, the diameter α of the diffusion point (31) ranges from 0.1 to 0.3 mm; when the refractive power is between -3.00D and -6.00D, the diameter α of the diffusion point (31) ranges from 0.2 to 0.4 mm; when the refractive power is greater than -6.00D, the diameter α of the diffusion point (31) ranges from 0.3 to 0.5 mm. The first curved surface (11) is also provided with a defocus area, which is arranged to overlap with the light diffusion area (3); The defocus area includes multiple defocus points, which form a defocus zone around the bright view area (2). The multiple defocus zones are distributed from the inside out with the bright view area (2) as the center. The multiple defocus zones and the multiple dot diffusion zones (32) are distributed alternately from the inside out with the bright view area (2) as the center.

3. The myopia control lens as described in claim 2, characterized in that, The visible area (2) is circular in shape and has a diameter of 3-6 mm.

4. The method for manufacturing myopia control lenses as described in claim 1, characterized in that, S1 includes: S11. Perform chemical cleaning and ultrasonic cleaning on the first curved surface; S12. Dry the first curved surface after cleaning.

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