Myopia control contact lenses based on oxygen permeable microstructures

Abstract

The invention relates to the technical field of contact lenses, in particular to a myopia control contact lens based on an oxygen-permeable microstructure, which comprises an inner side surface in contact with cornea and an outer side surface opposite to the inner side surface, the two ends of each microstructure hole are communicated with the inner side surface and the outer side surface; an inner correction surface is arranged on the inner side surface, an outer correction surface is arranged on the outer side surface, and a correction area for vision correction is arranged between the inner correction surface and the outer correction surface; any end of each microstructure hole is not communicated with the inner correction surface or the outer correction surface; and the microstructure holes have the same diameter. According to the scheme, the oxygen permeation amount can be increased, and meanwhile the myopia progress is delayed.

Description

Technical Field

[0001] The invention relates to the technical field of contact lenses, in particular to a myopia control contact lens based on an oxygen permeable microstructure. Background Art

[0002] Myopia refers to the situation where parallel light rays focus in front of the retina after passing through the eye's refractive system, resulting in blurred vision. In recent years, under the influence of electronic products and bad eye habits, the incidence of myopia in my country has shown a clear upward trend. In order to improve the vision of the eyes, it is usually necessary to wear myopia glasses to correct vision. However, the existing conventional lenses focus the image on the retina, but part of the peripheral image falls behind the retina, stimulating the axial elongation of the eyeball, which may lead to the deepening of myopia.

[0003] Therefore, in order to slow down the progression of myopia, the prior art designs retinal peripheral defocus lenses based on the above principles. While ensuring that the focused image falls on the retina, the peripheral imaging can also fall on the retina or in front of the retina, effectively controlling the elongation of the eye axis, thereby achieving the effect of slowing down the progression of myopia. In order to improve the convenience and safety of use, the prior art provides contact lenses with vision correction functions, but the contact lenses fit the eyeballs and are in close contact with the cornea, and the cornea has no capillaries, and its basal metabolism depends on oxygen supply to ensure the health of the cornea. The oxygen permeability of the contact lenses themselves is limited, and their close contact with the cornea may cause problems with the cornea due to lack of oxygen, such as dryness, discomfort, red eyes, etc. Long-term wearing of contact lenses with poor oxygen permeability greatly increases the risk of corneal infection. Therefore, there is an urgent need for a myopia control contact lens that can increase oxygen permeability and delay the progression of myopia. Summary of the invention

[0004] The present invention aims to provide a myopia control contact lens based on an oxygen permeable microstructure, which can increase oxygen permeability and delay the progression of myopia.

[0005] The present invention provides the following basic scheme: The myopia control contact lens based on oxygen permeable microstructure includes an inner side contacting the cornea and an outer side opposite to the inner side; and also includes a plurality of microstructure holes, the two ends of the microstructure holes connecting the inner side and the outer side.

[0006] Furthermore, an inner correction front face is provided on the inner side face, an outer correction front face is provided on the outer side face, and a correction area for vision correction is provided between the inner correction front face and the outer correction front face.

[0007] Further, any end of the microstructure hole is not connected to the inner correction front surface or the outer correction front surface.

[0008] Furthermore, the microstructure holes are distributed in a ring shape with the center of the inner side surface and the center of the outer side surface as the center.

[0009] Further, the microstructure pore matrix is ​​distributed.

[0010] Furthermore, the microstructure pores are randomly distributed.

[0011] Furthermore, the distance between adjacent microstructure holes is greater than M.

[0012] Furthermore, the diameters of the microstructured pores are all the same.

[0013] Furthermore, the diameter of the microstructured pores ranges from D1 to D2.

[0014] Furthermore, the minimum distance between adjacent microstructure holes is N times the diameter of the microstructure hole.

[0015] Beneficial effects of the basic program: In this solution, the inner side contacts the cornea of ​​the contact lens user, so as to realize the wearing and use of the contact lens. The two sides of the correction area are the inner correction front and the outer correction front. Through the setting of the correction area, the user's vision correction is realized. The existence of microstructure holes constructs an oxygen permeable channel between the outside world and the cornea, which can allow various substances in the eye to circulate with each other. First, it is easy for oxygen to pass through the microstructure holes, increasing the overall oxygen permeability of the contact lens, and realizing high oxygen permeability of the contact lens, thereby providing basal metabolism of the cornea, thereby greatly reducing the risk of corneal infection of the user. Second, the existence of microstructure holes constructs a tear interaction channel, and the blinking action of the eye will drive the tear to move. Through the blinking action combined with the setting of the microstructure holes, the tears on both sides of the contact lens are fully interacted, thereby ensuring that there is enough tears between the contact lens and the cornea, realizing lubrication and buffering between the contact lens and the cornea, and improving the comfort of contact lens use.

[0016] At the same time, there are a large number of microstructure holes. During the wearing and use of contact lenses, the medium in the microstructure holes is air or tears, which is different from the material of the contact lenses. When light passes through the contact lenses, it will pass through different media and is prone to scattering. By scattering light, the intensity of light passing through the contact lenses is reduced, and the contrast is effectively reduced. Based on the retinal contrast theory, under low contrast, it can reduce the stimulation to the visual system, thereby avoiding excessive growth of the eye axis, thereby delaying the progression of myopia. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of Example 1 of the myopia control contact lens based on oxygen permeable microstructure of the present invention; Figure 2 This is a schematic structural diagram of Example 1 of the myopia control contact lens based on oxygen permeable microstructure of the present invention from another viewing angle. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods: The reference numerals in the drawings of the specification include: inner side surface 1, outer side surface 2, microstructure hole 3, inner correction front surface 4, and outer correction front surface 5.

[0019] Embodiment 1 The myopia control contact lens based on the oxygen permeable microstructure includes a contact lens body. The contact lens body in this embodiment refers to a lens in contact with the cornea, such as a hard contact lens and a soft contact lens.

[0020] As attached Figure 1 , 2 As shown, it also includes an inner side surface 1 that contacts the cornea, and an outer side surface 2 that is opposite to the inner side surface 1. The side of the contact lens body that contacts the cornea is the inner side surface 1, and the side that can contact the eyelid is the outer side surface 2, and the inner side surface 1 and the outer side surface 2 are arranged opposite to each other. An inner correction front surface 4 is provided on the inner side surface 1, and an outer correction front surface 5 is provided on the outer side surface 2. Between the inner correction front surface 4 and the outer correction front surface 5 is a correction zone for vision correction, that is, the two sides of the correction zone are the inner correction front surface 4 and the outer correction front surface 5 respectively. The correction zone has a refractive power, which is used to correct the vision of the user. In other embodiments, the inner side surface 1 and the outer side surface 2 have the same refractive power, and the refractive powers of the inner side surface 1, the outer side surface 2, and the correction zone together constitute the refractive power of the contact lens to achieve vision correction.

[0021] It also includes a plurality of microstructure holes 3, the two ends of the microstructure holes 3 are connected to the inner side surface 1 and the outer side surface 2, and any end of the microstructure holes 3 is not connected to the inner correction front surface 4 or the outer correction front surface 5. Specifically, the contact lens body includes a correction area located in the center, and a functional area centered on the correction area, the functional area is annular, and the microstructure holes 3 are arranged on the functional area. The correction area is used to correct the user's vision, and the functional area is used to reduce the light intensity of the light passing through, reduce the contrast, and delay the user's myopia process.

[0022] There are many ways to distribute the microstructure pores 3. One is that the microstructure pores 3 are distributed in a ring with the center of the inner side surface 1 and the outer side surface 2 as the center; the second is that the microstructure pores 3 are distributed in a matrix; and the third is that the microstructure pores 3 are randomly distributed. In this embodiment, the microstructure pores 3 are distributed in a matrix. In this solution, the presence of a large number of dense microstructure pores 3 provides a quick channel for the supply of oxygen, effectively increasing the oxygen permeability of the contact lens body, thereby ensuring the basic metabolism of the cornea.

[0023] The diameters of the microstructure holes 3 are all the same, and the diameter range of the microstructure holes 3 is D1-D2. The microstructure holes 3 of the same diameter make the light scattering per unit area controllable. During production, by controlling the number and distribution density of the microstructure holes 3, it is possible to effectively control the light illumination, thereby effectively controlling the contrast change, and delaying the myopia process to the greatest extent while ensuring the user experience. The values ​​of D1 and D2 are 0.002mm and 0.004mm, respectively. In this embodiment, the diameter of the microstructure hole 3 is 0.003mm. The distance between adjacent microstructure holes 3 is greater than M. Specifically, the minimum value of the spacing between adjacent microstructure holes 3 is N times the diameter of the microstructure hole 3. The values ​​of M and N are 0.2mm and 100, respectively. In this embodiment, the distance between adjacent microstructure holes 3 is 0.36±0.01mm, and the spacing between adjacent microstructure holes 3 is 120 times the diameter of the microstructure hole 3.

[0024] By adopting this scheme, an oxygen permeable channel between the outside world and the cornea is constructed through the microstructure hole 3, so as to achieve high oxygen permeability of the contact lens, ensure the basic metabolism of the cornea, greatly reduce the risk of corneal infection of the user, and make the tears on the inner side 1 and the outer side 2 of the contact lens fully interact. At the same time, for light, the medium of the microstructure hole 3 and the contact lens is different. When the light passes through the contact lens, it passes through different media and is easy to be scattered. By scattering light, the intensity of light passing through the contact lens is reduced, and the contrast is effectively reduced. Based on the retinal contrast theory, under low contrast, the stimulation to the visual system can be reduced, thereby avoiding excessive growth of the eye axis, thereby delaying the progression of myopia.

[0025] Embodiment 2 In the myopia control contact lens based on oxygen permeable microstructure, the cross-sectional area of ​​the microstructure hole 3 is different. Specifically, the cross-sectional area at both ends of the microstructure hole 3 is smaller than the cross-sectional area in the middle of the microstructure hole 3, or the cross-sectional area at both ends of the microstructure hole 3 is larger than the cross-sectional area in the middle of the microstructure hole 3. By increasing the tortuosity inside the microstructure hole 3, the light deviates from the original propagation direction and moves in all directions, so that the light under different incident directions is scattered as much as possible, further reducing the illumination intensity of the light passing through, thereby reducing the contrast, thereby reducing the stimulation to the visual system, and effectively controlling the progress of myopia.

[0026] 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 know 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 this 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 ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, 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, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope 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. Myopia control contact lens based on oxygen permeable microstructure, characterized in that: It includes the inner side in contact with the cornea and the outer side opposite to the inner side; It also includes a plurality of microstructure holes, and two ends of the microstructure holes are connected to the inner side surface and the outer side surface.

2. The myopia control contact lens based on oxygen permeable microstructure according to claim 1, characterized in that: An inner correction front face is arranged on the inner side surface, an outer correction front face is arranged on the outer side surface, and a correction area for vision correction is arranged between the inner correction front face and the outer correction front face.

3. The myopia control contact lens based on oxygen permeable microstructure according to claim 2, characterized in that: Either end of the microstructure hole is not connected to the inner correction front surface or the outer correction front surface.

4. The myopia control contact lens based on oxygen permeable microstructure according to claim 3, characterized in that: The microstructure holes are distributed in a ring shape with the center of the inner side surface and the center of the outer side surface as the center.

5. The myopia control contact lens based on oxygen permeable microstructure according to claim 3, characterized in that: Microstructure pore matrix distribution.

6. The myopia control contact lens based on oxygen permeable microstructure according to claim 3, characterized in that: The microstructure pores are randomly distributed.

7. The myopia control contact lens based on oxygen permeable microstructure according to any one of claims 4 to 6, characterized in that: The distance between adjacent microstructure holes is greater than M.

8. The myopia control contact lens based on oxygen permeable microstructure according to claim 7, characterized in that: The diameters of the microstructured pores are all the same.

9. The myopia control contact lens based on oxygen permeable microstructure according to claim 8, characterized in that: The diameter of the microstructured pores ranges from D1 to D2.

10. The myopia control contact lens based on oxygen permeable microstructure according to claim 9, characterized in that: The minimum distance between adjacent microstructure holes is N times the diameter of the microstructure hole.

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