Myopia prevention and control lens for reducing retina imaging contrast

Abstract

The utility model relates to a myopia prevention and control lens capable of reducing retina imaging contrast, which comprises a lens body, and the lens body is provided with a first curved surface facing the eyes and a second curved surface opposite to the eyes. The first curved surface is provided with a bright visual area, a light diffusion area and a defocus area, the light diffusion area and the defocus area are annularly arranged on the bright visual area, and the light diffusion area and the defocus area are arranged in an overlapped mode and are the same in area; the first curved surface is further provided with a scale auxiliary area annularly arranged on the periphery of the light diffusion area. The myopia prevention and control device has the advantages that vision is effectively corrected through the bright vision area, contrast reduction is achieved through the light diffusion area, meanwhile, the defocus effect is achieved through the defocus area, vision deepening can be effectively restrained through combination of the three areas, and the myopia prevention and control effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, and in particular to a myopia prevention and control lens capable of reducing retinal imaging contrast. Background Art

[0002] Myopia is a refractive state in which parallel light rays are refracted through the eye's refractive system and the focus falls in front of the retina, so myopic eyes cannot see distant targets clearly. If the target is gradually moved closer to the eye, the emitted light will be dispersed to a certain extent to the eye, and the focus will move backward. When the target object moves closer to a certain point in front of the eye, the closer this point is to the eye, the deeper the myopia. At this stage, there is no theoretical system that can explain all the doubts about the causes and control mechanisms of myopia, and there are certain limitations. People spend more and more time using electronic devices with display screens such as mobile phones and computers in their daily lives. Although their fine and bright pictures will bring a good visual experience, they also have a strong contrast that will stimulate the growth of the eye axis and affect vision. Therefore, reducing the contrast also provides a new idea for myopia prevention and control, and it has been proven to be highly feasible through clinical practice.

[0003] At present, the commonly used myopia prevention and control lenses are defocus lenses, which use the principle of myopia defocus to correct the central refractive error while using the peripheral relative positive power to correct the peripheral retinal hyperopic defocus of myopia, thereby inhibiting the eye axis growth and myopia progression induced by the peripheral retinal hyperopic defocus, so as to delay the worsening of vision. However, traditional defocus lenses cannot change the contrast of the image on the retina, and the myopia prevention and control effect is not ideal in the environment where people use them in daily life.

[0004] Therefore, there is an urgent need for a myopia prevention and control lens that can reduce retinal imaging contrast while taking into account the defocus effect. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a myopia prevention and control lens that reduces the retinal imaging contrast, which solves the technical problem that the prior art cannot reduce the contrast and the myopia prevention and control effect is not ideal.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] The lens comprises a 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 area and a light diffusion area and a defocusing area arranged around the clear vision area, the light diffusion area and the defocusing area are arranged overlappingly, and the areas of the two are the same; the first curved surface also has a scale auxiliary area arranged around the periphery of the light diffusion area.

[0010] Optionally, the light diffusion area includes a plurality of diffusion points; the plurality of diffusion points surround the clear vision area to form the diffusion belt, and the plurality of diffusion belts are diffusely distributed from the inside to the outside with the clear vision area as the center.

[0011] Optionally, the diameter of the diffusion point is α, the value range of α is 0.1-0.5 mm, and the distance between two diffusion points is d=Δ2+α, Δ=0.4-0.8 mm.

[0012] Optionally, the defocus area is formed by combining a plurality of free-form surface areas, and the curvature radii of the plurality of free-form surface areas gradually increase from inside to outside with the clear vision area as the center, thereby gradually increasing the defocus amount.

[0013] Optionally, the light diffusion area and the defocus area are in the shape of a regular polygon or a circle.

[0014] Optionally, the clear vision area is circular in shape.

[0015] Optionally, the scale auxiliary area includes a plurality of reference lines evenly arranged around the light diffusion area; the reference lines are located on a straight line where the diameter of the clear vision area is located.

[0016] Optionally, the diameter of the clear vision area is 3 to 6 mm.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a myopia prevention and control lens that reduces the contrast of retinal imaging. The lens refracts light on the retina through the clear vision area on the lens, effectively corrects vision and ensures normal vision; the light diffusion area can reduce the contrast and brightness of the image in front of the line of sight on the retina, reducing the hue difference; the defocus area focuses in front of the retina to form myopia defocus, and effectively suppresses the stretching of the eye axis through advanced imaging; the scale auxiliary area can ensure that the optical center corresponds to the defocus geometric center, ensuring the accuracy of subsequent fitting. Compared with the existing technology, it effectively corrects vision through the clear vision area, reduces contrast through the light diffusion area, and achieves a defocus effect through the defocus area. The combination of the three can effectively suppress the deepening of vision and greatly improve the myopia prevention and control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a myopia prevention and control lens for reducing retinal imaging contrast in Example 1 of the utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0022] [Description of Reference Numerals]

[0023] 1: Lens body;

[0024] 2: bright field;

[0025] 3: light diffusion area; 31: diffusion point;

[0026] 4: scale auxiliary area; 41: baseline. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0028] Embodiment 1:

[0029] like Figure 1-Figure 2 As shown, a specific embodiment of the utility model provides a myopia prevention and control lens for reducing retinal imaging contrast, including a lens body 1, wherein the lens body 1 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 area 2 and a light diffusion area 3 and a defocus area arranged around the clear vision area 2, wherein the light diffusion area 3 overlaps with the defocus area and has the same area. The first curved surface also has a scale auxiliary area 4 arranged around the periphery of the light diffusion area 3. In this embodiment, the shape of the clear vision area 2 is circular, and its diameter is 5 mm.

[0030] Specifically, the clear vision area 2 on the lens refracts light onto the retina, effectively correcting vision and ensuring normal vision; the light diffusion area 3 can reduce the contrast and brightness of the image in front of the line of sight on the retina, reducing the hue difference; the defocus area focuses on the front of the retina to form myopic defocus, and effectively suppresses the stretching of the eye axis through advanced imaging; the scale auxiliary area 4 can ensure that the optical center corresponds to the defocus geometric center, ensuring the accuracy of subsequent fitting. Compared with the existing technology, it effectively corrects vision through the clear vision area 2, reduces contrast through the light diffusion area 3, and achieves a defocus effect through the defocus area. The combination of the three can effectively suppress the deepening of vision and greatly improve the effect of myopia prevention and control.

[0031] Furthermore, if Figure 1-Figure 2 As shown, the defocus area is formed by a combination of multiple free-form surface areas, and the curvature radius of the multiple free-form surface areas gradually increases from the inside to the outside with the clear vision area (2) as the center, thereby gradually increasing the defocus amount, so as to better fit the retinal structure of the eye, and have good wearing comfort while ensuring the defocus effect. The light diffusion area 3 includes multiple diffusion points 31, and the multiple diffusion points 31 form a circular diffusion belt around the clear vision area 2. The multiple diffusion belts are diffused from the inside to the outside with the clear vision area 2 as the center, thereby effectively ensuring that the contrast of the refracted light at each position on the lens body 1 is consistent. The defocus area and the multiple diffusion belts are alternately diffused from the inside to the outside with the clear vision area 2 as the center. A part of the light in front of the line of sight enters the clear vision area 2, and is focused on the retina after being refracted by the clear vision area 2. The other part reduces the contrast through the light diffusion area 3, and cooperates with the defocus area to focus in front of the retina, which can effectively inhibit the deepening of vision.

[0032] Furthermore, if Figure 1-Figure 2 As shown, in this embodiment, a plurality of diffusion points 31 evenly surround the clear vision area 2 to form a circular diffusion zone. The shape of the light diffusion area 3 can also be a regular polygon, and a plurality of regular polygonal diffusion zones diffuse from the inside to the outside with the clear vision area 2 as the center to form a regular polygonal light diffusion area 3.

[0033] Furthermore, in this embodiment, according to the contrast reduction effect of the diffusion point 31 diameter and the dot spacing, it is divided into three levels, namely, slight reduction, moderate reduction and high reduction. The precise diffusion point 31 and dot spacing size of the light diffusion zone 3, and the relationship between the two can ensure the contrast reduction effect while adapting to the retinal contrast reduction requirements in different situations. The high-precision light diffusion zone 3 can accurately achieve different levels of contrast reduction, making the lens surface smoother, the lens better at projecting light, and more beautiful in appearance.

[0034] It is generally recommended that the diopter be slightly reduced if it is less than -3.00D: the diameter α of the diffusion point 31 ranges from 0.1 to 0.3 mm, and the distance between two adjacent diffusion points 31 is d = Δ2 +α, Δ=0.4~0.8mm.

[0035] The diopter is moderately reduced between -3.00D and -6.00D: the diameter α of the diffusion point 31 ranges from 0.2 to 0.4 mm, and the distance between two adjacent diffusion points 31 is d = Δ 2 +α, Δ=0.4~0.8mm.

[0036] When the diopter is greater than -6.00D, the height is reduced: the diameter α of the diffusion point 31 ranges from 0.3 to 0.5 mm, and the distance between two adjacent diffusion points 31 is d = Δ 2 +α, Δ=0.4~0.8mm.

[0037] This can more effectively improve the effect of the light diffusion zone 3, but the specific conditions of each person's glasses are different, and a doctor or optometrist can select the appropriate gear according to the refractive power and axial length of the eye.

[0038] Furthermore, as shown in the figure, the scale auxiliary area 4 includes a plurality of reference lines 41 evenly arranged around the light diffusion area 3, and the reference lines 41 are located on the straight line where the diameter of the clear vision area 2 is located. In the process of customizing the lens, the intersection of the straight lines where the two reference lines 41 are located is the geometric center point. By using this as the base point for processing corresponding to the optical center, it can be ensured that the optical center corresponds to the defocus geometric center position, thereby ensuring the subsequent accurate fitting and pupil correspondence, and then ensuring the vision correction and prevention and control effects of the lens, and improving wearing comfort and compliance.

[0039] Embodiment 2:

[0040] This embodiment provides a pair of glasses, including the myopia prevention and control lenses described in Example 1.

[0041] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A myopia prevention and control lens for reducing retinal imaging contrast, characterized in that: The lens body (1) comprises 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 area (2) and a light diffusion area (3) and a defocusing area arranged around the clear vision area (2); The first curved surface also has a scale auxiliary area (4) arranged around the periphery of the light diffusion area (3).

2. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 1, characterized in that: The light diffusion area (3) includes a plurality of diffusion points (31); A plurality of diffusion points (31) surround the clear vision area (2) to form the diffusion belt, and the plurality of diffusion belts are diffusely distributed from the inside to the outside with the clear vision area (2) as the center.

3. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 2, characterized in that: The diameter of the diffusion point (31) is α, the value range of α is 0.1-0.5 mm, and the distance between two diffusion points (31) is d=Δ 2 +α, Δ=0.4~0.8mm.

4. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 1, characterized in that: The defocus area is formed by combining a plurality of free-curved surface areas, and the curvature radius of the plurality of free-curved surface areas gradually increases from the inside to the outside with the clear vision area (2) as the center, thereby gradually increasing the defocus amount.

5. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 1, characterized in that: The light diffusion area (3) is in the shape of a regular polygon or a circle.

6. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 1, characterized in that: The clear vision area (2) is circular in shape.

7. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 6, characterized in that: The scale auxiliary area (4) comprises a plurality of reference lines (41) uniformly arranged around the light diffusion area (3); The reference line (41) is located on the straight line where the diameter of the clear vision area (2) is located.

8. The myopia prevention and control lens for reducing retinal imaging contrast according to claim 1, characterized in that: The diameter of the clear vision area (2) is 3 to 6 mm.

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