Composite myopia defocus and light scattering structure type myopia prevention and control function lens

Abstract

The utility model provides a composite myopia defocus and light scattering structure type myopia prevention and control function lens, which solves the problems of delaying and controlling myopia of teenagers and the like, and comprises a lens body, and a convex surface and a concave surface are respectively arranged at the front and the back of the lens body. The lens body is sequentially divided into a central optical area, a peripheral functional structure area and a peripheral optical area from the center to the outside, a myopic defocusing scattering structure is arranged on the lens body, the myopic defocusing scattering structure is positioned on a concave surface of the peripheral functional structure area, and the myopic defocusing scattering structure has myopic defocusing and light scattering functions. The myopia suppression device has the advantages of good myopia suppression effect, convenience in processing and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of function lenses, and in particular relates to a myopia prevention and control function lens with a composite myopic defocus and light scattering structure. Background Art

[0002] Conventional defocus lenses have limited effect in inhibiting the development of myopia in adolescents, and cannot delay and control the progression of myopia in adolescents to a limited extent. The comfort, binocular vision function and wearing safety of the lenses are also poor.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed a variety of solutions. For example, a Chinese patent document discloses a concentric annular multi-zone lens for delaying the progression of myopia in the human eye [202080063526.8], which includes multiple correction zones, which have the same refractive power for forming a focused image on the retina to correct refractive errors. It also includes multiple defocus zones, which form an image in front of the retina to produce myopic defocus, some of which are defocus increase zones, and their refractive power gradually becomes more correct toward the periphery of the lens. This design delays the progression of myopia by producing a greater degree of myopic defocus in the peripheral retina. The correction zone and the defocus zone are arranged alternately in the lens.

[0004] The above solution solves the problem of vision correction to a certain extent, but it still has many shortcomings, such as limited effect on delaying and controlling myopia in adolescents. Summary of the invention

[0005] The purpose of the utility model is to provide a composite myopia defocus and light scattering structure type myopia prevention and control function lens with reasonable design and good myopia suppression effect in view of the above problems.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a composite myopic defocus and light scattering structure type myopia prevention and control function lens, including a lens body, the front and back of the lens body are convex and concave respectively, the lens body is divided into a central optical zone, a peripheral functional structure zone and a peripheral optical zone from the center to the outside, a myopic defocus scattering structure is arranged on the lens body, the myopic defocus scattering structure is located on the concave surface of the peripheral functional structure zone, and the myopic defocus scattering structure has myopic defocus and light scattering functions.

[0007] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control function lens, the myopic defocus scattering structure is pits distributed discontinuously on the concave surface of the peripheral functional structure area; when light passes through the pits on the peripheral functional structure area, the object in front of the lens body forms a virtual image in front of the center of the retina, producing a myopic defocus effect, and at the same time the pits increase the haze of the lens body, reducing the imaging clarity of the object in front of the lens body, producing a light scattering effect.

[0008] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control functional lens, the plane size of the pit is 0.01-1000μm.

[0009] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control functional lens, the pit depth is 0.01-100μm.

[0010] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control function lens, the central optical zone is an area centered on the reference point of the lens body and having a diameter greater than or equal to 5 mm.

[0011] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control function lens, the peripheral functional structure area is an area centered on the reference point of the lens body and excludes the central optical zone and the peripheral optical zone.

[0012] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control function lens, the peripheral optical zone is an area centered on the reference point of the lens body and excludes the central optical zone and the peripheral functional structure zone; when light passes through the central optical zone and the peripheral optical zone, the object in front of the lens body forms a clear image at the center of the retina.

[0013] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control functional lens, the haze value Y of the peripheral functional structure area and the diameter X of the peripheral functional area satisfy the following functional relationship:

[0014] Y = a*SIN(X)+b;

[0015] Where a and b are real numbers.

[0016] In the above-mentioned composite myopic defocus and light scattering structure type myopia prevention and control function lens, the surface of the lens body is coated.

[0017] Compared with the existing technology, the advantages of the utility model are: the myopic defocus scattering structure on the surface of the functional lens has myopic defocus function and light scattering function, and the imaging in front of the retina realizes myopic defocus, while delaying the progression of myopic refractive power and the growth of the eye axis by reducing the imaging clarity and contrast; the myopic defocus scattering structure adopts pits, which have good light scattering effect, and can effectively increase the haze of the lens compared with the conventional microlens structure, and produce light scattering effect without affecting the myopic defocus; the surface of the lens body is coated to improve the overall strength of the lens and extend the overall service life of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the function lens of the utility model;

[0019] Figure 2 It is a structural cross-sectional view of the functional lens of the utility model;

[0020] In the figure, there is a lens body 1, a central optical zone 2, a peripheral functional structure zone 3, a peripheral optical zone 4, a myopic defocus scattering structure 5, and a pit 6. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1-2 As shown, a composite myopic defocus and light scattering structure type myopia prevention and control function lens comprises a lens body 1, wherein the lens body 1 has a convex surface and a concave surface at the front and back, respectively, and the lens body 1 is divided into a central optical zone 2, a peripheral functional structure zone 3 and a peripheral optical zone 4 from the center to the outside, and a myopic defocus scattering structure 5 is arranged on the lens body 1, and the myopic defocus scattering structure 5 is located on the concave surface of the peripheral functional structure zone 3, and the myopic defocus scattering structure 5 has myopic defocus and light scattering functions. The refractive power of the central optical zone 2 and the peripheral optical zone 4 is consistent with the myopia degree of adolescents, and when the light passes through the central optical zone 2 and the peripheral optical zone 4 of the lens body 1, the object in front of the lens body 1 forms a clear image in the center of the retina; when the light passes through the myopic defocus scattering structure 5, the object in front of the lens body 1 forms a virtual image in front of the center of the retina, thereby producing a myopic defocus effect. The myopic defocus scattering structure 5 also has a scattering function, which can increase the haze of the lens, reduce the imaging contrast, and reduce the imaging clarity of the object in front of the lens body 1, thereby producing a light scattering effect. The above-mentioned myopic defocused scattering structure 5 can delay and control the progression of juvenile myopia to a limited extent, and improve the comfort, binocular vision function and wearing safety of lenses for juvenile myopic patients.

[0023] Specifically, the myopic defocused scattering structure 5 is a discontinuous distribution of pits 6 on the concave surface of the peripheral functional structure area 3 , and the pits 6 are of different sizes. The different refractive powers lead to deviations in the imaging position, which reduces the imaging contrast of the peripheral functional structure area 3 .

[0024] The plane size of the pit 6 in the present application is limited to 0.01-1000 μm, the depth of the pit 6 is 0.01-100 μm, the plane diameter is greater than the depth, and the focal length of each pit 6 is usually smaller than the central optical zone 2 and the peripheral optical zone 4, ensuring that its imaging position is in front of the retina.

[0025] In depth, the central optical zone 2 is an area centered on the reference point of the lens body 1 and having a diameter greater than or equal to 5 mm. Its specific diameter size is adapted to the size of the cornea, and a central optical zone 2 with a diameter of 5 mm is usually selected.

[0026] Similar to the structure of conventional defocused lenses, the peripheral functional structure area 3 is an area centered on the reference point of the lens body 1 and excluding the central optical area 2 and the peripheral optical area 4; the difference is that the microstructure used in conventional defocused lenses is usually a micro-convex lens arranged in a matrix on a convex surface, while the present application has pits 6 on the concave surface of the peripheral functional structure area 3, and the surface microstructure can be rapidly formed by ion source processing and other technologies. Compared with the pits 6, the processing is more convenient and has higher processing accuracy.

[0027] The peripheral optical zone 4 is a region centered on the reference point of the lens body 1 and excluding the central optical zone 2 and the peripheral functional structure zone 3. The peripheral optical zone 4 cooperates with the central optical zone 2 to ensure that light passes through the lens body 1 and forms a clear image at the center of the retina.

[0028] Furthermore, the haze value Y is the percentage of the transmitted light intensity that deviates from the incident light by more than 2.5° to the total transmitted light intensity. The greater the haze, the lower the gloss and transparency of the film, especially the imaging degree. The haze value Y of the peripheral functional structure area 3 and the diameter X of the peripheral functional area satisfy the following functional relationship:

[0029] Y = a*SINX+b;

[0030] Where a and b are real numbers. The functional relationship between the haze value Y and the diameter X of the peripheral functional structure area 3 is limited to take into account both the myopia control effect and the visual quality. The peripheral functional structure area 3 reduces the contrast and has a better effect on delaying the myopia diopter than the defocus lens control effect.

[0031] The surface coating of the lens body 1 is strengthened to improve the surface wear resistance and corrosion resistance.

[0032] In addition, the myopic defocused scattering structure 5 in the peripheral functional structure area 3 reduces the contrast and controls myopia without being affected by heterophoria. It can be an effective substitute for adolescents with obvious exotropia or esotropia who are unable to wear defocused lenses.

[0033] To sum up, the principle of this embodiment is that the lens body 1 is divided into a central optical zone 2, a peripheral functional structure zone 3 and a peripheral optical zone 4 from the center to the outside, wherein pits 6 are discontinuously distributed on the concave surface where the peripheral functional structure zone 3 is located, and the myopic defocus scattering structure 5 achieves myopic defocus while reducing imaging clarity, further improving the myopia suppression effect.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although the terms lens body 1, central optical zone 2, peripheral functional structure zone 3, peripheral optical zone 4, myopic defocus scattering structure 5, pit 6, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional limitation is contrary to the spirit of the utility model.

Claims

1. A myopia prevention and control functional lens with a composite myopic defocus and light scattering structure, comprising a lens body (1), wherein the lens body (1) has a convex surface and a concave surface at the front and rear, respectively, and the lens body (1) is divided into a central optical zone (2), a peripheral functional structure zone (3) and a peripheral optical zone (4) from the center to the outside, characterized in that: The lens body (1) is provided with a myopic defocus scattering structure (5), the myopic defocus scattering structure (5) is located on the concave surface of the peripheral functional structure area (3), and the myopic defocus scattering structure (5) has myopic defocus and light scattering functions; the myopic defocus scattering structure (5) is a pit (6) distributed on the concave surface of the peripheral functional structure area (3); when light passes through the pit (6) on the peripheral functional structure area (3), the object in front of the lens body (1) forms a virtual image in front of the center of the retina, producing a myopic defocus effect, and at the same time the pit (6) increases the haze of the lens body (1), so that the image clarity of the object in front of the lens body (1) is reduced, producing a light scattering effect.

2. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The pits (6) are distributed in a discontinuous manner.

3. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The plane size of the pit (6) is 0.01-1000 μm.

4. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 3, characterized in that: The depth of the pit (6) is 0.01-100 μm.

5. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The central optical zone (2) is a region centered on the reference point of the lens body (1) and having a diameter greater than or equal to 5 mm.

6. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The peripheral functional structure area (3) is an area centered on the reference point of the lens body (1) and excluding the central optical area (2) and the peripheral optical area (4).

7. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The peripheral optical zone (4) is an area centered on the reference point of the lens body (1) and excluding the central optical zone (2) and the peripheral functional structure zone (3).

8. The compound myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The haze value Y of the peripheral functional structure area (3) and the diameter X of the peripheral functional area satisfy the following functional relationship: Y=a*SIN(X)+b; Where a and b are real numbers.

9. The composite myopic defocus and light scattering structured myopia prevention and control functional lens according to claim 1, characterized in that: The surface of the lens body (1) is coated.

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