A microstructured defocus lens with variable additional defocus amount

Abstract

This invention discloses a microstructured defocus lens with variable additional defocus amount, comprising an aspherical substrate and a microstructured additional defocus area. The microstructured additional defocus area includes a central light-transmitting area and multiple microstructure areas. Each microstructure area contains at least two microstructures of different sizes and with different additional defocus amounts. The additional defocus amount of the microstructure is determined by the refractive power required for visual correction. There are at least three sizes and at least three types of microstructures, each with a different size and additional defocus amount. The difference in additional defocus amount between different types of microstructures is not less than 0.1D. This invention provides wearers with a reasonable additional defocus amount, avoiding problems of excessive or insufficient defocus signals. The variable microstructure and additional defocus amount effectively improve myopia management. Simultaneously, the aspherical substrate suppresses some hyperopic defocus from the surface profile direction and provides better aberration correction, improving wearing comfort.

Description

Technical Field

[0001] This utility model relates to a defocus lens, and more particularly to a microstructure defocus lens with variable additional defocus amount. Background Technology

[0002] When correcting myopia and slowing its progression, the primary task is to reduce, suppress, or eliminate the effects of hyperopic defocus. Currently, the main method for treating retinal hyperopic defocus is wearing defocus lenses. Microstructure (lens) lenses are the mainstream defocus lenses available today. For example, patent "Eyeglass Lens" (2013106281748) discloses an eyeglass lens for correcting peripheral retinal hyperopic defocus. This lens consists of a first refractive region located in the center and a second refractive region located in the periphery. The first refractive region is a uniform and smooth refractive surface, and the second refractive region is a 360° annular refractive surface composed of multiple independent island-shaped microlenses. Existing defocus lenses on the market have a fixed or uniformly varying amount of additional defocus in their microstructure (microlenses), without differentiating between individuals with different corrected visual acuity. This means that the defocus signal stimulation generated by microstructure defocus lenses worn by people with different degrees of myopia is the same or similar, failing to provide different defocus signal stimulation for different degrees of myopia. This makes it impossible to avoid situations where people with low myopia wearing microstructure lenses with high additional defocus, resulting in excessive defocus signals that cause the opposite direction of accommodation, increasing the probability of myopia progression. In addition, most microstructure defocus lenses on the market use microstructures of the same size and with the same additional defocus within the same ring (circular, rectangular, hexagonal, etc.), failing to provide more varied defocus signal stimulation. How to adjust the additional defocus based on the wearer's corrected visual acuity and provide more varied defocus signal stimulation within the ring are problems that current microlens lenses need to solve. Solving this problem can improve the efficiency of myopia management. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to propose a microstructured defocus lens with variable additional defocus amount to solve the problems of the additional defocus amount of the microstructure being too large or too small compared to the wearer's corrected visual acuity, and the defocus signal being too large or too small.

[0004] Technical solution: This utility model includes an aspherical substrate and a microstructure additional defocus area. The microstructure additional defocus area includes a central light-transmitting area and multiple microstructure areas. Each microstructure area contains at least two types of microstructures with different sizes and different additional defocus amounts. The additional defocus amount of the microstructure is determined by the refractive power required to correct vision. There are at least three types of microstructure size and additional amount.

[0005] There are no fewer than three types of microstructures, and each type of microstructure has a different size and additional defocus amount. The additional defocus amount of different types of microstructures differs by no less than 0.1D.

[0006] The maximum additional defocus of the microstructure does not exceed the absolute value of the aspherical substrate diopter plus 1.0D diopter.

[0007] Within each microstructure region, microstructures are distributed at intervals according to different types, and adjacent microstructures are arranged at intervals.

[0008] The microstructure additional defocus zone is divided into four parts from the center of the lens outwards: the ratio of the number of rings in each part to the total number of rings does not exceed one-quarter, one-half, one-quarter, and one-half, respectively. The microstructure size and additional defocus amount distributed in the first part of the microstructure zone increase from the minimum value, but are not the maximum value; the microstructure size and additional defocus amount distributed in the second part decrease from the maximum value, but are not the minimum value; the microstructure size and additional defocus amount distributed in the third part increase from the minimum value to the maximum value; and the microstructure size and additional defocus amount distributed in the fourth part increase from the minimum value, but are not the maximum value.

[0009] Aspherical substrates are used to support microstructures, additional defocus zones, and to provide the refractive power required for corrective vision.

[0010] The refractive power range for visual acuity correction by aspheric substrates is -10D to 10D, and for astigmatism, it is -5D to 5D. The variation of the refractive power at the edge of the aspheric substrate compared to the central refractive power shall not exceed 15% of the central refractive power, and the maximum deviation shall not exceed 0.5D.

[0011] The diameter of the microstructure is not less than 0.5 mm.

[0012] The diameter of the central light-transmitting area is not less than 5mm.

[0013] Beneficial effects: This utility model can provide wearers with a reasonable amount of additional defocus, avoiding the problem of excessive or insufficient defocus signal, and the provision of variable microstructure and additional defocus can effectively improve myopia management; at the same time, it provides an aspherical substrate, which suppresses some hyperopic defocus from the surface direction and provides better aberration correction effect, improving wearing comfort. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Example 1

[0017] like Figure 1As shown, the microstructured defocus lens with variable additional defocus amount of this utility model includes an aspherical substrate 1 and a microstructured additional defocus area 2. The aspherical substrate 1 is used to support the microstructured additional defocus area 2 and provide the refractive power required for visual correction. The microstructured additional defocus area 2 includes a central light-transmitting area 201 and multiple microstructure areas. The diameter of the central light-transmitting area 201 is not less than 5 mm, and the number of microstructures in the microstructured additional defocus area 2 is not less than 6 rings. Each microstructure area contains at least two different sizes and different additional defocus amounts of microstructures 202. The diameter of the microstructure 202 is not less than 0.5 mm, and the additional defocus amount of the microstructure 202 is determined by the refractive power required for visual correction and is not a fixed value. The size and additional amount of the microstructure 202 in the microstructured additional defocus area 2 are at least three different.

[0018] There are at least three types of microstructures 202, each with different dimensions and additional defocusing amounts. The maximum additional defocusing amount of a microstructure 202 does not exceed the absolute value of the aspherical substrate 1 plus 1.0D of refractive power. The difference in additional defocusing amounts between different types of microstructures 202 is not less than 0.1D. In the additional defocusing area 2, the microstructures 202 in each microstructure are distributed at different intervals according to different types, and there should be gaps between adjacent microstructures 202, not tightly connected. The interval between adjacent microstructures 202 is not limited to equal or non-equal intervals. The types of microstructures 202 are not limited to microlenses, cylindrical lenses, Gaussian structures, etc.

[0019] The microstructure additional defocus zone 2, extending outward from the lens center, consists of four parts. The ratio of the number of rings in each part to the total number of rings does not exceed 25%, 50%, 25%, and 50%, respectively. The size of the microstructure 202 and the additional defocus amount distributed in the first part of the microstructure zone increase from the minimum value, but are not the maximum value. The size of the microstructure 202 and the additional defocus amount distributed in the second part decrease from the maximum value, but are not the minimum value. The size of the microstructure 202 and the additional defocus amount distributed in the third part increase from the minimum value to the maximum value. The size of the microstructure 202 and the additional defocus amount distributed in the fourth part increase from the minimum value, but are not the maximum value.

[0020] The refractive power range of the aspheric substrate 1 is -10D to 10D for corrected visual acuity and -5D to 5D for astigmatism. The variation of the edge refractive power of the aspheric substrate 1 compared with the central refractive power shall not exceed 15% of the central refractive power, and the maximum deviation refractive power shall not exceed 0.5D.

[0021] This embodiment provides a microstructured defocus lens with variable additional defocus amount, which can provide the wearer with a reasonable additional defocus amount. At the same time, it provides an aspherical substrate to suppress some hyperopic defocus from the surface direction and provide better aberration correction effect, thereby further improving the efficiency of myopia management.

[0022] Example 2

[0023] like Figure 1 As shown, the microstructured defocusing lens with variable additional defocus in this embodiment has 12 microstructures. This microstructured defocusing lens includes an aspherical substrate 1 and a microstructured additional defocusing region 2. The microstructured additional defocusing region 2 includes a central light-transmitting area 201 and microstructures 202. The aspherical substrate 1 provides a corrected visual acuity of -3.0D; the diameter of the central light-transmitting area 201 is 9.5mm; the microstructured additional defocusing region 2 has three types of microstructures 202 with diameters of 0.7mm, 0.8mm, and 0.9mm, corresponding to additional defocus amounts of 2.7D, 3.2D, and 3.5D, respectively. The maximum additional defocus amount of the microstructure 202 is the absolute value of the refractive power of the aspherical substrate 1 plus 0.5D. The refractive power at the edge of the aspherical substrate 1 is reduced by 10.3% compared to the central refractive power. In the microstructure region of the microstructure additional defocusing zone 2, microstructures 202 of different types are evenly distributed in each microstructure area, with gaps between adjacent microstructures 202. The microstructure region 2, extending outward from the lens center, consists of four parts, occupying 2, 4, 2, and 4 rings respectively. Each microstructure contains two types of microstructures 202. The microstructures 202 distributed in the first part have dimensions of 0.7 and 0.8, with additional defocus amounts of 2.7D and 3.2D respectively; the microstructures 202 distributed in the second part have dimensions of 0.8 and 0.9, with additional defocus amounts of 3.2D and 3.5D respectively; the microstructures 202 distributed in the third part have dimensions of 0.7 and 0.9, with additional defocus amounts of 2.7D and 3.5D respectively; and the microstructures 202 distributed in the fourth part have dimensions of 0.7 and 0.8, with additional defocus amounts of 2.7D and 3.2D respectively. The type of microstructure 202 is a microlens.

Claims

1. A microstructured defocus lens with variable additional defocus amount, characterized in that, It includes an aspherical substrate and a microstructure additional defocus area. The microstructure additional defocus area includes a central light-transmitting area and multiple microstructure areas. Each microstructure area contains at least two types of microstructures of different sizes and different additional defocus amounts. The additional defocus amount of the microstructure is determined by the refractive power required to correct visual acuity. The maximum additional defocus amount of the microstructure does not exceed the absolute value of the refractive power of the aspherical substrate plus 1.0D of refractive power.

2. The microstructured defocus lens with variable additional defocus amount according to claim 1, characterized in that, The number of microstructures shall be no less than three, and the difference in additional defocusing amount between different types of microstructures shall be no less than 0.1D.

3. The microstructured defocus lens with variable additional defocus amount according to claim 2, characterized in that, Within each microstructure region, microstructures are distributed at intervals according to different types, and adjacent microstructures are arranged at intervals.

4. The microstructured defocus lens with variable additional defocus amount according to claim 1, characterized in that, The microstructure additional defocus area is divided into four parts from the center of the lens outwards: the ratio of the number of rings in each part to the total number of rings does not exceed one-quarter, one-half, one-quarter, and one-half, respectively. The microstructure size and additional defocus amount distributed in the first part of the microstructure area increase from the minimum value, but are not the maximum value; the microstructure size and additional defocus amount distributed in the second part decrease from the maximum value, but are not the minimum value; the microstructure size and additional defocus amount distributed in the third part increase from the minimum value to the maximum value; and the microstructure size and additional defocus amount distributed in the fourth part increase from the minimum value, but are not the maximum value.

5. A microstructured defocus lens with variable additional defocus amount according to claim 1, characterized in that, The aspherical substrate is used to support the additional defocus zone of the microstructure and to provide the refractive power required for corrective vision.

6. A microstructured defocus lens with variable additional defocus amount according to claim 5, characterized in that, The refractive power range for visual acuity correction by the aspherical substrate is -10D to 10D, and for astigmatism, it is -5D to 5D.

7. A microstructured defocus lens with variable additional defocus amount according to claim 1, characterized in that, The diameter of the microstructure is not less than 0.5 mm.

8. A microstructured defocus lens with variable additional defocus amount according to claim 1, characterized in that, The diameter of the central light-transmitting area is not less than 5mm.

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