Progressive multifocal ring focus / defocus convergence lens

Abstract

This invention relates to the field of lens technology, particularly to a progressive multifocal ring-focusing and defocusing converging lens, comprising: a lens matrix, a distance vision ring-focus area, a near vision ring-focus area, a progressive area, and an outer vision area. The ring-focusing and defocusing converging microstructure is as follows: in the distance vision ring-focus area corresponding to the main optical area, a single ring-shaped cylindrical convex microlens generates a defocus amount C1, which is then converged by all the ring-shaped cylindrical convex microlenses in the upper distance vision area to generate a first converged defocus amount C11. In the near vision ring-focus area, a single ring-shaped cylindrical convex microlens generates a defocus amount C2, which is then converged by all the ring-shaped cylindrical convex microlenses in the lower near vision area to generate a second converged defocus amount C11. This invention achieves a smoother change in defocus amount at mid-to-long distances, reducing visual fatigue. It solves the problem in existing technologies where some lenses exhibit unstable defocus amounts at mid-to-long distances, resulting in unstable defocus amounts even with accommodation, thereby preventing and controlling the progression of myopia in children and adolescents.

Description

Technical Field

[0001] This invention relates to the field of lens technology, specifically a progressive multifocal ring-focusing and defocusing converging lens. Background Technology

[0002] Lenses are components made of transparent optical materials such as glass and resin. Their surfaces are mostly curved, and they come in spherical, aspherical, and perfect spherical designs. They can control light through refraction and reflection to achieve functions such as focusing, imaging, and vision correction. They are widely used in eyeglasses, cameras, microscopes, telescopes, and other equipment. Eyeglass lenses, in particular, can correct vision problems such as myopia, hyperopia, and astigmatism, and are a core component of vision correction and various optical instruments.

[0003] Existing myopia control lenses often have poor performance, primarily due to their simplistic optical design and insufficient matching between the defocus area and the retinal sensitive zone. Current myopia control lenses require significant eye accommodation for near vision, leading to unstable defocus levels. Inaccurate measurements of parameters such as pupillary distance and pupillary height during fitting can cause optical center shifts. Limited manufacturing processes result in unstable defocus signal transmission and low accuracy. Most lenses are produced using standardized methods, lacking customized designs for individual refractive errors and visual function abnormalities. Furthermore, long-term wear can induce neural adaptation. Existing myopia control lenses mainly fall into two categories: progressive multifocal lenses, with the upper part for distance vision, the lower part for near vision, and a progressive channel in the middle, primarily reducing accommodation for near vision to control myopia; and multi-point defocus and annular focal lenses, which mainly generate peripheral retinal myopic defocus to control myopia. Both types of lenses have limited functionality. Progressive multifocal lenses cannot generate peripheral retinal myopic defocus signals, while multi-point defocus and annular focal lenses require significant eye accommodation for near vision, resulting in limited myopia control effectiveness for both types. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides the following technical solution: A progressive multifocal ring-focusing and defocusing converging lens, comprising a lens matrix, a distance vision ring focal zone, a near vision ring focal zone, a progressive zone, and an external vision zone, characterized in that: The aforementioned ring-focus and defocus-converging microstructure is as follows: In the distance vision ring-focus area corresponding to the main optical area, a single ring-shaped columnar convex microlens generates a defocus amount C1. The optical axis of the ring-shaped columnar convex microlens is deflected in the direction of the geometric center of the lens, forming a converging defocus structure so that the peripheral defocused light rays converge on a predetermined curved surface in front of the retina. All ring-shaped columnar convex microlenses generate a first converging defocus amount C11.

[0005] In the focal zone corresponding to near vision, a single annular columnar convex microlens generates a defocus amount C2. The optical axis of the annular columnar convex microlens is deflected in the direction of the geometric center of the lens, forming a converging defocus structure so that the peripheral defocused light rays converge on a predetermined curved surface in front of the retina. All annular columnar convex microlenses generate a second converging defocus amount C22.

[0006] In the progressive zone, the focal zone of the telephoto ring is tangent to or at a certain distance from the focal zone of the near-field ring. The defocusing amount in the progressive and peripheral zones gradually increases from the upper telephoto and upper peripheral zones to the lower near-field and lower peripheral zones, with the defocusing amount of each individual annular columnar convex microlens and the converging defocusing amount smoothly connected.

[0007] The defocus amount C1 generated by a single annular columnar convex microlens in the upper far-field area is not equal to the defocus amount C2 generated by a single annular columnar convex microlens in the lower near-field area.

[0008] The first convergence defocus amount C11 at the top is not equal to the second convergence defocus amount C22 at the bottom.

[0009] The lens also includes an outer field of view surrounding the distance vision ring focal area, the near vision ring focal area, and the progressive zone, wherein the optical surface shape of the outer field of view is smoothly connected to the main optical area.

[0010] In the above technical solution, the optical axis deflection angle α of the microlens unit satisfies: 0° < α ≤ 25°, and the deflection angle α increases with the increase of the distance between the microlens unit and the geometric center of the lens, thereby forming a myopic defocus arc area parallel to the front of the retina. The refractive correction ring and the defocus ring are connected in a tangential and continuous manner or through a transition surface, so that there are no seams between the concentric rings of different refractive powers.

[0011] As an improvement to the above technical solution: The absolute value of the defocusing amount of the lower single annular columnar convex microlens is greater than the absolute value of the defocusing amount of the upper single annular columnar convex microlens, i.e., |C2| > |C1|; the absolute value of the second converging defocusing amount C22 is greater than the absolute value of the first converging defocusing amount C11, i.e., |C22| > |C11|.

[0012] As an improvement to the above technical solution: The convergence defocusing amount generated by the individual annular columnar convex microlens in the progressive region, from the adjacent telephoto viewing ring focal area to the adjacent near-photo viewing ring focal area, increases continuously linearly or non-linearly. The defocusing amount of the individual annular columnar convex microlens in the progressive region gradually increases from the adjacent or near telephoto and upper regions to the adjacent near-photo region, with a smooth transition between the adjacent telephoto and near-photo region. Similarly, the defocusing amount of the individual annular columnar convex microlens converging microstructure gradually increases from the upper and outer regions to the lower and outer regions, with a smooth transition between the defocusing amounts.

[0013] As an improvement to the above technical solution: The distribution density of the annular columnar convex microlens defocusing and converging microstructure in the near-vision annular focal region is higher than or equal to the distribution density in the far-vision annular focal region.

[0014] As an improvement to the above technical solution: The distribution density of the defocusing and converging microstructure of the ring-shaped columnar convex microlens in the progressive region gradually increases or remains unchanged from the adjacent distant viewing ring focal region to the adjacent near viewing ring focal region.

[0015] As an improvement to the above technical solution: The defocusing and converging microstructure of the annular columnar convex microlens is a concentric ring, a fan-shaped ring segment, or a polygonal ring segment, and its optical axis direction is consistent with or vector-adjusted with the normal direction of the curved surface of the main optical area at its location.

[0016] As an improvement to the above technical solution: 7. A method for preparing a lens as described in any one of claims 1-6, characterized in that it comprises the following steps: S1: Determine the design parameters of the lens prescription and the main optical zone of the progressive multifocal lens, including the boundary and curvature distribution of the distance vision ring focal zone (2), the near vision ring focal zone (3), the progressive zone (4) and the outer vision zone (5); S2: Based on the visual physiological model for myopia prevention and control, target convergence and defocus functions are set for the distant visual ring focal zone (2), the near visual ring focal zone (3), and the progressive zone (4), respectively; S3: Based on the results of steps (1) and (2), generate a non-uniform CNC machining file for controlling the change of the sag of each point of the defocusing and converging microstructure of the annular columnar convex microlens; S4: Based on the processing documents, first make a processing mold, and then process it through an integrated molding process or in stages to produce an optical element containing the main optical area curved progressive surface and the ring-shaped columnar convex microlens defocusing and converging microstructure. The progressive surface and the ring-shaped columnar convex microlens can be located on both sides of the lens.

[0017] The beneficial effects of this invention are: 1. In this invention, the lens achieves a smoother change in defocus amount at near, intermediate, and far distances, thus reducing visual fatigue. This solves the problem in the prior art where the change in defocus amount is not smooth when switching between near and far distances, resulting in low efficiency in reducing visual fatigue.

[0018] 2. In this invention, the lens achieves stable defocus while reducing eye accommodation in the near vision zone, ensuring the effectiveness of myopia control and prevention. It solves the problem in the prior art where, when teenagers wear glasses, the lens frequently switches between near and far vision, and the eye accommodation is used for near vision, resulting in unstable defocus, poor myopia-related defocus effect, and unnatural near vision. This type of lens has the effect of preventing and controlling myopia.

[0019] 3. In this invention, the lens can be fitted for children and adolescents who are not myopic but have insufficient or no hyperopic reserve, thus playing a role in myopia prevention. During fitting, the distance vision zone can be used to fit children and adolescents with insufficient hyperopic reserve, while the near vision zone provides an additional +1.50D to +2.50D. Certain hyperopic defocus amounts are set for the upper near vision zone, distance vision zone, and the surrounding and peripheral non-vision zones. Without affecting distance, intermediate, and near vision, the lens is perfectly designed with a large convex lens as a focal point, upon which are further designed a smaller convex lens for distance vision and a larger convex lens for near vision. This reduces accommodation when viewing near objects while producing a myopic defocus effect on the peripheral retina, thereby preventing myopia.

[0020] 4. In this invention, through the triple design of "circumferential defocus + microlens enhancement + optical axis convergence", this invention can more effectively use peripheral defocus to control axial elongation, and theoretically has a better myopia control effect than existing circumferential lenses or multi-point defocus lenses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the left lens of the present invention with the convex side facing upwards and the concave side facing downwards; Figure 2 This is a schematic diagram showing the right lens of the present invention with the convex side facing upwards and the concave side facing downwards; Figure 3 This is a processing path diagram for the left and right spectacle lenses of the present invention.

[0022] Reference numerals: 1. Lens matrix; 2. Distance vision ring focal zone; 3. Near vision ring focal zone; 4. Asymptotic zone; 5. External vision zone. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] See appendix Figures 1-3 As shown, a progressive multifocal ring-focusing and defocusing converging lens includes a lens substrate 1, a distance vision ring-focusing zone 2, a near vision ring-focusing zone 3, a progressive zone 4, and an outer vision zone 5. Its key feature is that the ring-focusing and defocusing converging microstructure is as follows: In the distance vision ring-focusing zone 2, corresponding to the main optical zone, a single ring-shaped cylindrical convex microlens generates a defocus amount C1, and all ring-shaped cylindrical convex microlenses in the distance vision zone generate a first converging defocus amount C11. In the near vision ring-focusing zone 3, a single ring-shaped cylindrical convex microlens generates a defocus amount C2, and all ring-shaped cylindrical convex microlenses in the near vision zone generate a second converging defocus amount C22. In the progressive zone 4, the ring-shaped zones of the distance vision ring-focusing zone 2 and the near vision ring-focusing zone 3 are tangent or designed with a certain distance between them; the defocus amount in the progressive zone and the outer vision zone gradually increases from the upper distance vision zone and the upper outer vision zone to the lower near vision zone and the lower outer vision zone, with a smooth transition between the defocus amount of a single ring-shaped cylindrical convex microlens and the converging defocus amount. The defocus amount C1 generated by a single annular columnar convex microlens in the upper distance viewing area is not equal to the defocus amount C2 generated by a single annular columnar convex microlens in the lower near viewing area. The upper first converging defocus amount C11 is not equal to the lower second converging defocus amount C22. The lens also includes an outer viewing area 5 surrounding the distance viewing ring focal area 2, the near viewing ring focal area 3, and the progressive area 4, the optical surface of the outer viewing area 5 being smoothly connected to the main optical area.

[0025] See Figures 1-3 The absolute value of the defocus amount of the lower annular columnar convex microlens is greater than the absolute value of the defocus amount of the upper annular columnar convex microlens, that is, |C2| > |C1|. The absolute value of the second converging defocus amount C22 is greater than the absolute value of the first converging defocus amount C11, that is, |C22| > |C11|. The defocus amount in the progressive zone and the peripheral zone gradually increases from the upper far-use zone and the upper peripheral zone to the lower near-use zone and the lower peripheral zone. The defocus amount of a single annular columnar convex microlens and the converging defocus amount are smoothly connected.

[0026] See Figures 1-3 The defocusing amount of a single annular columnar convex microlens in the progressive region 4 increases continuously or non-linearly from the adjacent distant viewing ring focal region 2 to the adjacent near viewing ring focal region 3.

[0027] See Figures 1-3The distribution density of the defocused microstructure of the annular columnar convex microlens in the near-vision ring focal region 3 is higher than or equal to the distribution density in the far-vision ring focal region 2.

[0028] See Figures 1-3 The distribution density of the defocused microstructure of the annular columnar convex microlens in the progressive region 4 gradually increases or remains unchanged from the adjacent distant viewing ring focal region 2 to the adjacent near viewing ring focal region 3.

[0029] See Figures 1-3 The defocusing microstructure of the annular columnar convex microlens is a concentric ring, a fan-shaped ring segment, or a polygonal ring segment, and its optical axis direction is consistent with or vector-adjusted with the normal direction of the curved surface of the main optical area at its location.

[0030] See Figures 1-3 A method for preparing a lens as described in any one of claims 1-6, comprising the following steps: S1: Determine the design parameters of the lens prescription and the main optical zone of the progressive multifocal lens, including the boundary and curvature distribution of the distance vision ring focal zone 2, the near vision ring focal zone 3, the progressive zone 4, and the outer vision zone 5.

[0031] S2: Based on the visual physiological model for myopia prevention and control, target convergence and defocus functions are set for the focal zone 2 for distance vision, the focal zone 3 for near vision, and the progressive zone 4, respectively.

[0032] S3: Based on the results of steps 1 and 2, generate a non-uniform CNC machining file for controlling the change of the sag of each point in the defocusing and converging microstructure of the annular columnar convex microlens.

[0033] S4: Based on the processing documents, first make a processing mold, and then process it through an integrated molding process or in stages to produce an optical element containing the main optical area curved progressive surface and the ring-shaped columnar convex microlens defocusing and converging microstructure. The progressive surface and the ring-shaped columnar convex microlens can be located on both sides of the lens.

[0034] The above lens processing steps are all referenced in the appendix. Figure 3 The processing path.

[0035] Example 1: This embodiment provides a progressive multifocal ring-focusing and defocusing converging lens suitable for myopia prevention and control in adolescents. Its structure and optical parameters are as follows: 1. Overall lens structure: The lens substrate 1 is made of high-refractive-index optical resin or PC material with refractive indices n=1.60, n=1.67, n=1.71, and n=1.74. The substrate surface is divided into five functional areas: Distance vision ring focal zone 2: Located at the top of the lens, the bright vision zone corresponds to the direction of the distance line of sight, and the diameter of the bright vision zone is approximately 8mm. Near vision ring focal zone 3: Located on the lower inner side of the lens, the bright vision zone corresponds to the near vision line of sight, and the diameter of the bright vision zone is about 7mm. The lens fitting cross (core reference point) is located approximately 3mm above the geometric center of the lens. Progressive zone 4: connects the far-field focusing zone 2 and the near-field focusing zone 3, with a channel length of approximately 9mm-18mm and a width of approximately 5mm; External Zone 5: Located outside of the focal zone 2 for distant viewing, the focal zone 3 for near viewing, and the progressive zone 4, its optical surface shape smoothly transitions with the main optical zone.

[0036] Setting the defocus amount of the annular columnar convex microlens: The defocus amount C1 of a single ring-shaped columnar convex microlens surrounding the focal zone and the bright vision zone of the distance vision ring is set to +2.00D to +5.00D. The defocus amount of a single ring-shaped columnar convex microlens is determined individually according to the lens refractive power and lens refractive range.

[0037] The defocus amount C2 of a single ring-shaped columnar convex microlens surrounding the near vision ring focal zone and the photopic vision zone is set to +4.00D to +7.00D. The defocus amount of a single ring-shaped columnar convex microlens is determined individually according to the lens refractive power and lens refractive range.

[0038] The defocusing amount of a single annular columnar convex microlens in the lower near-field area is greater than that of a single annular columnar convex microlens in the upper far-field area. The C2 minus C1 value is set in the range of +1.50D to 2.50D.

[0039] The defocus amount in the progressive zone gradually increases from the upper and telephoto zones to the lower and near zones. The defocus amount changes smoothly from the defocus amount in the upper telephoto zone to the defocus amount in the lower near zone.

[0040] The defocus amount in the outer area gradually increases from the defocus amount in the upper and far-use areas to the defocus amount in the lower and near-use areas, with a smooth transition in defocus amount.

[0041] 2. Setting the convergence and defocusing amount of the annular columnar convex microlens: The defocusing amount C11 is generated by the convergence of all the annular and columnar microlenses in the focal area 2 of the telescopic vision ring. The first convergence defocus amount C11 is set to +1.50D to +4.00D, which is adapted to the defocus amount setting for myopic viewing when looking at distant objects; The defocus amount C22 generated by the convergence of all the annular columnar convex microlenses in the near vision ring focal zone 3 is set to +3.00D to +6.5D, which meets the design requirement of |C22|>|C11|. This enhances the ability to generate a stable myopic defocus amount when reducing accommodation in near vision, thus achieving better myopia prevention and control effects. The convergence defocus of all the annular microcylindrical lenses in the lower near-field area is greater than that of all the annular microcylindrical lenses in the upper far-field area. The C22 minus C11 value is set in the range of +1.50D to 2.50D.

[0042] The defocus amount of a single annular columnar convex microlens in the progressive zone 4 increases continuously and linearly or non-linearly from the adjacent far-viewing ring focal zone 2 to the adjacent near-viewing ring focal zone 3, ensuring a smooth transition in the defocus amount when viewing objects at far, medium, and near distances.

[0043] 3. Distribution of defocusing and converging microstructures in annular and columnar convex microlenses: The microstructure adopts a concentric ring structure, and the optical axis direction is consistent with or vector-adjusted with the normal direction of the curved surface of the main optical area at its location to ensure the accuracy of light refraction.

[0044] 4. Experimental data proves: The lens of this embodiment was tested using an optical interferometer and a focimeter. The results show that: The convergence defocusing amount of the telephoto viewing ring focal area 2 is stable within the set range of +1.50D to +4.00D, and the defocusing amount of the near viewing ring focal area 3 is stable within the set range of +3.00D to +6.5D. The defocusing accuracy meets the design requirements. The convergence and defocusing amount in the progressive zone 4 does not jump, and the linear increasing trend is clear, which significantly improves the visual comfort of viewing objects at medium distances. The measured value of the microstructure distribution density deviates from the design value by less than 5%, ensuring the uniformity and continuity of the defocusing effect.

[0045] Example 2: A non-linear incremental scheme for a progressive multifocal ring-focusing and defocusing converging lens This embodiment, based on Embodiment 1, adjusts the defocus increment method in the progressive zone to adapt to the visual needs of different users: 1. Core parameter adjustment: For distance vision, the ADD power in the focal zone 2 (optical center, bright field) and the focal zone 3 (optical center, bright field) is set to +1.50D to +2.50D. The ADD power is individually set according to the prescription and visual function results. The luminous intensity of the channel in progressive zone 4 gradually increases from the far-use luminous intensity zone to the near-use luminous intensity zone.

[0046] 2. Microstructure optimization: The microstructure adopts a fan-shaped ring segment form, and the optical axis direction is vector-adjusted to better match the user's line of sight in the bright field of vision, reducing peripheral aberrations; In summary, the lenses in the above embodiments can also be processed based on Fresnel lenses, retaining the refracting bevel to create a myopic defocus zone. When wearing such lenses, the line of sight of both eyes passes precisely through the optical center of the distance vision zone when looking at distant objects, and precisely through the optical center of the near vision zone when looking at near objects. During fitting, the near vision zone is closer to the nasal side.

[0047] Experimental data shows that this solution has a smoother change in defocus at near and far distances, reducing visual fatigue. At the same time, the stable defocus in the near-field zone with reduced accommodation ensures the core effect of myopia prevention and control, making it especially suitable for teenagers who need to frequently switch between near and far-field scenarios.

[0048] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Anyone skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A progressive multifocal ring-focusing and defocusing converging lens, comprising a lens matrix (1), a distance vision ring focal zone (2), a near vision ring focal zone (3), a progressive zone (4), and an external vision zone (5), characterized in that: The ring-focus defocusing and converging microstructure is as follows: in the far-view ring-focus area (2) corresponding to the main optical area, a single ring-shaped columnar convex microlens generates a defocus amount C1, and all ring-shaped columnar convex microlenses in the far-view area generate a first converging defocus amount C11. In the near-vision ring focal zone (3), a single ring-shaped columnar convex microlens generates a defocus amount C2, and all ring-shaped columnar convex microlenses in the far-vision zone generate a second converging defocus amount C22. In the progressive zone (4), the far-viewing ring focal zone (2) is tangent to the near-viewing ring focal zone (3) or is designed to be at a certain distance; the defocus amount of the progressive zone and the outer zone gradually increases from the upper far-viewing zone and the upper outer zone to the lower near-viewing zone and the lower outer zone, and the defocus amount of a single ring-shaped columnar convex microlens and the converging defocus amount are smoothly connected.

2. The defocus amount C1 generated by the upper far-field annular columnar convex microlens is not equal to the defocus amount C2 generated by the lower near-field annular columnar convex microlens; The first convergence defocusing amount C11 at the top is not equal to the second convergence defocusing amount C22 at the bottom; The lens also includes an outer region (5) surrounding the distance vision ring focal area (2), the near vision ring focal area (3) and the progressive region (4), the optical surface of the outer region (5) being smoothly connected to the main optical area.

3. The progressive multifocal ring-focusing and defocusing converging lens according to claim 1, characterized in that: The absolute value of the defocusing amount of the lower annular columnar convex microlens is greater than the absolute value of the defocusing amount of the upper annular columnar convex microlens, i.e., |C2| > |C1|; the absolute value of the second converging defocusing amount C22 is greater than the absolute value of the first converging defocusing amount C11, i.e., |C22| > |C11|.

4. The progressive multifocal ring-focusing and defocusing lens according to claim 2, characterized in that: The convergence defocusing amount generated by the ring focus and defocusing convergence microstructure in the progressive region (4) increases continuously in a linear or nonlinear manner from the adjacent remote viewing ring focus region (2) to the adjacent near-viewing ring focus region (3).

5. The progressive multifocal ring-focusing and defocusing converging lens according to claim 3, characterized in that: The distribution density of the annular columnar convex microlens converging microstructure in the near-vision ring focal region (3) is higher than or equal to the distribution density in the far-vision ring focal region (2).

6. The progressive multifocal ring-focusing and defocusing converging lens according to claim 4, characterized in that: The distribution density of the annular columnar convex microlens converging microstructure in the progressive region (4) gradually increases or remains unchanged from the adjacent distant viewing ring focal region (2) to the adjacent near viewing ring focal region (3).

7. The progressive multifocal ring-focusing and defocusing converging lens according to claim 4, characterized in that: The converging microstructure of the annular columnar convex microlens is a concentric ring, a fan-shaped ring segment, or a polygonal ring segment, and its optical axis direction is consistent with or vector-adjusted with the normal direction of the curved surface of the main optical area at its location.

8. A method for preparing a lens as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Determine the design parameters of the lens prescription and the main optical zone of the progressive multifocal lens, including the boundary and curvature distribution of the distance vision ring focal zone (2), the near vision ring focal zone (3), the progressive zone (4) and the outer vision zone (5); S2: Based on the visual physiological model for myopia prevention and control, target convergence and defocus functions are set for the distant visual ring focal zone (2), the near visual ring focal zone (3), and the progressive zone (4), respectively; S3: Based on the results of steps (1) and (2), generate a non-uniform CNC machining file for controlling the change of the sag of each point of the defocusing and converging microstructure of the annular columnar convex microlens; S4: Based on the processing documents, first make a processing mold, and then process it through an integrated molding process or in stages to produce an optical element containing the main optical area curved progressive surface and the ring-shaped columnar convex microlens defocusing and converging microstructure. The progressive surface and the ring-shaped columnar convex microlens can be located on both sides of the lens.

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