Multi-level myopia control lens for delaying myopia progress

Abstract

The invention relates to the technical field of contact lenses, in particular to a multi-level myopia control lens for delaying the myopia progress, which comprises a lens body, the lens body comprises an inner lens layer and an outer lens layer which are overlapped, and at least one functional layer is arranged between the inner lens layer and the outer lens layer. A plurality of microstructure patterns are arranged on the functional layer and are used for reducing the illumination intensity passing through the functional layer; the microstructure pattern is arranged on the functional layer through an etching or printing and dyeing technology; materials adopted by the inner lens layer and the outer lens layer are different from materials adopted by the functional layer. By adopting the scheme, the loss of the myopia prevention and control structure caused by daily use can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of contact lenses, in particular to a multi-level myopia control lens for delaying the progression of myopia. Background Art

[0002] In recent years, the myopia rate of primary and secondary school students in my country has exceeded 50%, and has been increasing year by year. The number of myopic people under the age of 18 has exceeded 100 million. For teenagers, they use their eyes frequently when attending classes and doing homework. At the same time, the axial length of teenagers is in a critical period of growth and development. If it is not controlled, it will be difficult to correct their myopia when their axial length is overdeveloped. At the same time, the increase in axial length of moderate and high myopia greatly increases the risk of serious eye diseases and may even lead to irreversible blindness. Therefore, controlling the development of myopia and abnormal axial length elongation is an important goal at present.

[0003] In order to avoid the deepening of myopia, a peripheral defocus lens is provided in the prior art. For normal eyes, external parallel light passes through the cornea and lens to form an image on the retina. Myopia refers to the situation that when the eyes are in a relaxed state, after the external parallel light passes through the cornea and lens, the imaging focus is not on the retina, but in front of the retina, resulting in blurred vision. After adjustment through the peripheral defocus lens, the position of the imaging focus is changed to be located on the retina, achieving the purpose of clear vision. However, although the focus image of the existing peripheral defocus lens is on the retina, its peripheral image falls behind the retina, which easily causes hyperopia-type defocus, leading to elongation of the eye axis, thereby deepening the degree of myopia.

[0004] In order to achieve the above purpose, peripheral defocus lenses usually have microstructures on the lens surface, such as designing a number of microlenses on the lens surface, and changing the peripheral imaging position through the microlenses to achieve effective prevention and control of myopia. However, because peripheral defocus lenses are difficult to produce and need to be customized according to the user, their configuration cycle and cost are high. Under the condition of good myopia prevention and control effect, the use cycle of peripheral defocus lenses is also relatively long. At the same time, the existing peripheral defocus lenses are frame glasses, which are not used carefully during use, so the lens surface is very easy to wear. If the microlenses on the lens surface are worn, it is difficult to ensure the myopia prevention and control effect. At the same time, the cost of lens replacement is also high. Therefore, there is an urgent need for a myopia control lens that can reduce the loss of myopia prevention and control structure caused by daily use and extend the service life. Summary of the invention

[0005] The present invention aims to provide a multi-level myopia control lens for delaying the progression of myopia, which can reduce the damage to the myopia prevention and control structure caused by daily use and extend the service life.

[0006] The present invention provides the following basic scheme: A multi-level myopia control lens for delaying the progression of myopia comprises a lens body, wherein the lens body comprises an overlapping inner lens layer and an outer lens layer, a functional layer is arranged between the inner lens layer and the outer lens layer, the number of the functional layers is at least one, and a plurality of microstructure patterns are arranged on the functional layer, wherein the plurality of microstructure patterns are used to reduce the intensity of light passing through the functional layer.

[0007] Furthermore, the microstructure pattern is disposed on the functional layer by etching or printing technology.

[0008] Furthermore, a correction zone is provided at the center of the functional layer, and the correction zone has the same refractive power as the inner lens layer and the outer lens layer.

[0009] Furthermore, a functional area is provided on the functional layer, the functional area is ring-shaped, and the correction area is located within the inner ring of the functional area.

[0010] Furthermore, the microstructure pattern is distributed in a ring shape with the correction area as the center.

[0011] Further, a matrix of microstructure patterns is distributed in the functional areas.

[0012] Furthermore, the microstructure pattern adopts one or more of dots, lines, and polygons.

[0013] Furthermore, the microstructure pattern includes a plurality of microdots, and the plurality of microdots form the microstructure pattern according to a preset rule.

[0014] Furthermore, the material used for the inner lens layer and the outer lens layer is different from the material used for the functional layer.

[0015] Beneficial effects of the basic program: 1. Studies have found that high-contrast signals will promote stronger bipolar cell activity. Relatively speaking, low contrast has a weak stimulation on the visual system, which allows the eye axis to grow normally and light to gather on the retina to form a clear image; while high contrast has a very strong stimulation on the visual system, which can easily cause excessive growth of the eye axis, resulting in the inability of light to focus on the retina, causing myopia to grow. Therefore, people who are in a high-contrast environment for a long time are more likely to develop myopia.

[0016] In this solution, the vision is corrected through the correction area in the center, so that the wearer can see clearly without affecting his normal life. The setting of the microstructure pattern changes the light intensity after passing through the functional layer, so that the light intensity after passing through the functional layer is different from the light intensity after passing through the correction area, thereby reducing the light intensity after passing through the lens body, and by reducing the contrast, the difference in vision between the affected cone cells and normal cone cells is reduced, and by controlling the photosensitivity of the cone cells, the stimulation to the eye axis is effectively reduced, delaying the development of myopia.

[0017] 2. In this solution, the functional layer is arranged between the inner lens layer and the outer lens layer, which effectively prevents the microstructure pattern on the functional layer from contacting the outside world, thereby avoiding wear of the microstructure pattern during daily use, thereby ensuring the optical stability of the lens body, achieving effective prevention and control of myopia, effectively extending its service life, and reducing the wearer's burden of use.

[0018] By adopting this solution, the contrast is reduced through the microstructure pattern, which effectively delays the progression of myopia. At the same time, the wear and tear of the myopia prevention and control structure (i.e., the microstructure pattern) caused by daily use is reduced, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a lens body of an embodiment of a multi-level myopia control lens for delaying the progression of myopia according to the present invention; Figure 2 It is a schematic structural diagram of the functional layers of an embodiment of a multi-level myopia control lens for delaying the progression of myopia according to the present invention. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods: The reference numerals in the drawings of the specification include: inner lens layer 1, outer lens layer 2, functional layer 3, correction area 4, and microstructure pattern 5.

[0021] Example A multi-level myopia control lens for delaying the progression of myopia, comprising a lens body, such as an attached Figure 1 As shown, the lens body includes an inner lens layer 1 and an outer lens layer 2 which overlap, and a functional layer 3 is provided between the inner lens layer 1 and the outer lens layer 2, and the number of the functional layer 3 is at least one layer. In this embodiment, the number of the functional layer 3 is one layer. In other embodiments, the number of the functional layer 3 is multiple layers, and the multiple functional layers 3 cooperate to achieve the purpose of low contrast, or functional layers 3 with different functions are provided to cooperate to achieve multiple effects, for example, a functional layer 3 is provided with a related structure for reducing contrast, and another functional layer 3 is provided with a color pattern to change the pupil color after wearing.

[0022] The material used for the inner lens layer 1 and the outer lens layer 2 is different from the material used for the functional layer 3. The material used for the inner lens layer 1 and the outer lens layer 2 is one of glass, resin, and polycarbonate (PC material), and the material used for the functional layer 3 is PP, PE, or PET. In this embodiment, the material used for the inner lens layer 1 and the outer lens layer 2 is resin, and the material used for the functional layer 3 is PET.

[0023] A correction zone 4 is provided at the center of the functional layer 3, and the correction zone 4 has the same refractive power as the inner lens layer 1 and the outer lens layer 2. A functional zone is provided on the functional layer 3, and the functional zone is annular, and the correction zone 4 is located inside the inner ring of the functional zone. The inner lens layer 1 and the outer lens layer 2 have the same radius of curvature, and the inner lens layer 1 and the outer lens layer 2 have the same refractive power. The functional layer 3 is a high-transmittance film layer that does not interfere with the passage of light. The refractive power of the inner lens layer 1 and the outer lens layer 2 constitutes the refractive power of the lens body, thereby correcting the wearer's vision, so that the user can see things clearly after wearing the myopia control lens of this solution.

[0024] A plurality of microstructure patterns 5 are provided on the functional layer 3, and the plurality of microstructure patterns 5 are used to reduce the intensity of light passing through the functional layer 3. Specifically, the microstructure pattern 5 is provided on the functional layer 3 by etching or printing technology, for example, the microstructure pattern 5 is formed by etching on the functional layer 3 by an excimer laser device, or the microstructure pattern 5 is formed by printing on the functional layer 3 by a printing device. In this embodiment, the microstructure pattern 5 is provided on the functional layer 3 by etching technology.

[0025] The microstructure pattern 5 is one or more of dots, lines, and polygons. The microstructure pattern 5 is distributed in a matrix in the functional area. In this embodiment, the microstructure pattern 5 is dots. Figure 2 In other embodiments, the microstructure pattern 5 is distributed in a ring shape with the correction area 4 as the center. In another embodiment, the microstructure pattern 5 includes a plurality of microdots, and the plurality of microdots form the microstructure pattern 5 according to a preset rule. Specifically, each microstructure pattern 5 is composed of a plurality of dots, and the plurality of dots are arranged according to the golden section line to form the microstructure pattern 5.

[0026] This solution is applied to non-contact lenses. When in use, the lenses are polished according to the glasses frame, and the polished lenses are embedded in the glasses frame to obtain frame glasses for wearing. In other embodiments, this solution can be applied to contact lenses such as hard contact lenses, soft contact lenses, and hydrogel lenses. The material used for the inner lens layer 1 and the outer lens layer 2 is one of hydrogel, silicone hydrogel, non-ionic, and MPC silicone hydrogel, and the material used for the functional layer 3 is PE or PET. Specifically, the material used for the inner lens layer 1 and the outer lens layer 2 is hydrogel, and the material used for the functional layer 3 is PET.

[0027] By adopting this solution, the vision is corrected through the correction area 4 in the center, so that the wearer can see things clearly without affecting his normal life. The setting of the microstructure pattern 5 changes the light intensity after passing through the functional layer 3, and by reducing the contrast, effectively reduces the stimulation to the eye axis and delays the development of myopia. At the same time, the functional layer 3 is set between the inner lens layer 1 and the outer lens layer 2, which effectively prevents the microstructure pattern 5 on the functional layer 3 from contacting the outside world, thereby avoiding wear of the microstructure pattern 5 during daily use, thereby ensuring the optical stability of the lens body, achieving effective prevention and control of myopia, and effectively extending its service life.

[0028] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

[0029] The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multi-level myopia control lens for delaying the progression of myopia, comprising a lens body, characterized in that: The lens body comprises an overlapping inner lens layer and an outer lens layer, a functional layer is arranged between the inner lens layer and the outer lens layer, the number of the functional layers is at least one, and a plurality of microstructure patterns are arranged on the functional layer, and the plurality of microstructure patterns are used to reduce the light intensity passing through the functional layer.

2. The multi-level myopia control lens for delaying myopia progression according to claim 1, characterized in that: The microstructure pattern is set on the functional layer by etching or printing technology.

3. The multi-level myopia control lens for delaying myopia progression according to claim 2, characterized in that: A correction zone is arranged at the center of the functional layer, and the correction zone has the same refractive power as the inner lens layer and the outer lens layer.

4. The multi-level myopia control lens for delaying myopia progression according to claim 3, characterized in that: A functional area is arranged on the functional layer, the functional area is in a ring shape, and the correction area is located in the inner ring of the functional area.

5. The multi-level myopia control lens for delaying myopia progression according to claim 4, characterized in that: The microstructure pattern is distributed in a ring shape with the correction area as the center.

6. The multi-level myopia control lens for delaying myopia progression according to claim 4, characterized in that: A matrix of microstructure patterns is distributed in the functional areas.

7. The multi-level myopia control lens for delaying myopia progression according to claim 6, characterized in that: The microstructure pattern adopts one or more of dots, lines and polygons.

8. The multi-level myopia control lens for delaying myopia progression according to claim 6, characterized in that: The microstructure pattern includes a plurality of microdots, and the plurality of microdots form the microstructure pattern according to a preset rule.

9. The multi-level myopia control lens for delaying myopia progression according to any one of claims 1 to 8, characterized in that: The materials used for the inner lens layer and the outer lens layer are different from the materials used for the functional layer.

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