An annular gradient through-focus lens

Abstract

The utility model relates to the field of off-focus lens, especially ring gradient off-focus lens, a ring gradient off-focus lens, including lens main part, be equipped with the off-focus microstructure ring of multiple concentric settings of inwards and outwards nested settings on the lens main part, the geometric center of lens main part is equipped with myopia correction area, from inwards and outwards first circle to third circle is equipped as inner circle, fourth circle to seventh circle is equipped as middle circle, eighth circle to tenth circle is equipped as outer circle, the off-focus amount gradient of inner circle, middle circle and outer circle increases gradually. The application constructs the basic framework of multiple concentric off-focus microstructure ring combined with partition gradient off-focus. By the lens main part is designed as the microstructure ring of geometric center myopia correction area, inner circle, middle circle, outer circle, break the limitation of traditional off-focus lens fixed off-focus amount, multiple concentric design guarantees off-focus area continuity, provides basic framework for subsequent structure optimization, improves lens application scope and core performance.

Description

Technical Field

[0001] This utility model relates to the field of defocus lenses, and in particular to an annular gradient defocus lens. Background Technology

[0002] In the current field of myopia correction, traditional monofocal lenses can only correct refractive errors in the central area of ​​the eyeball, and cannot effectively defocus the peripheral retina, making it difficult to inhibit axial elongation, which leads to a continuous increase in myopia.

[0003] Early defocus lenses, while incorporating peripheral defocus design, had significant drawbacks: First, the defocus amount was mostly fixed, failing to adapt to the needs of different myopia degrees, such as low, moderate, and high. Low-degree users were prone to visual distortion and eye strain due to excessive defocus, while high-degree users experienced ineffective control due to insufficient defocus. Second, the microstructure shape was mostly a single circle, with gaps between the circular structures, resulting in low filling rate and easily forming "intermittent non-defocus areas," leading to poor defocus uniformity. Third, the arrangement of the microstructure rings did not consider differences in ocular anatomy (such as the nasal side being obstructed by the bridge of the nose, and the temporal side being a key area for axial elongation), with fixed spacing between rings, resulting in a strong foreign body sensation on the nasal side and insufficient defocus strength on the temporal side.

[0004] To address the aforementioned issues of poor adaptability, uneven optical performance, and discomfort when worn, there is an urgent need for a defocused lens that can be gradient-adapted to different power levels and has an optimized structural shape and arrangement. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an annular gradient defocus lens.

[0006] The annular gradient defocus lens provided in this application adopts the following technical solution: A ring-shaped gradient defocus lens includes a lens body with multiple concentric defocus microstructure rings nested from the inside out. A myopia correction zone is located at the geometric center of the lens body. The first to third rings from the inside out are designated as the inner ring, the fourth to seventh rings as the middle ring, and the eighth to tenth rings as the outer ring. The defocus amount of the inner, middle, and outer rings increases progressively.

[0007] Through the above technical solution, this application constructs a basic architecture combining multi-ring concentric defocus microstructure rings with zoned gradient defocus. By designing the lens body as a geometrically centered myopia correction zone, inner ring, middle ring, and outer ring microstructure rings, it breaks the limitation of fixed defocus amount in traditional defocus lenses, achieving the integration of correction and control functions. The myopia correction zone solves the problem of blurred central vision, and the gradient defocus microstructure rings can be specifically adapted to low, medium, and high myopia users, avoiding the problems of visual fatigue for low-myopia users and insufficient control for high-myopia users. The multi-ring concentric design ensures the continuity of the defocus area, providing a basic architecture for subsequent structural optimization and improving the lens's applicability and core performance.

[0008] Furthermore, the defocusing amount of the inner ring (2) is +3.50D to +4.00D, the defocusing amount of the middle ring (3) is +4.00D to +5.00D, and the defocusing amount of the outer ring (4) is +5.00D to +6.00D.

[0009] Through the above technical solution, this application clarifies the specific defocus range of the inner, middle and outer rings. Based on the balance logic that the defocus intensity of the peripheral retina is positively correlated with the myopia control effect, but excessive defocus will cause visual discomfort, it achieves precise adaptation of the defocus amount, avoids the defects of one-size-fits-all design, and at the same time, the defocus amount of each ring is smoothly connected, reducing optical jumps and improving visual continuity.

[0010] Furthermore, the microstructure of the inner ring is elliptical, while the microstructures of the middle and outer rings are regular hexagons.

[0011] Through the above technical solution, this application adopts a differentiated design for the shape of the microstructure. The inner circle is elliptical, while the middle and outer circles are hexagonal, adapting to the functional needs of different areas of the lens and the anatomical features of the eyeball. The inner circle is the transition area between the central correction area and the peripheral defocus area, providing a wider horizontal field of vision and a narrower vertical field of vision. The elliptical shape can reduce optical differences in the transition area. The middle and outer circles are the core defocus control areas. The hexagonal shape has seamless splicing characteristics, which can eliminate the gaps between circular structures. Furthermore, the symmetry of the hexagon better conforms to the optical distribution law of the peripheral retina, ensuring that the defocus effect does not diminish after long-term wear, thus solving the core pain point of uneven defocus in traditional circular microstructures.

[0012] Furthermore, the major axis of the elliptical microstructure in the inner ring is 1.2 mm and the minor axis is 1.0 mm.

[0013] Through the above technical solution, this application clarifies the specific dimensions of the inner elliptical microstructure, optimizing optical adaptability while ensuring compatibility. A major axis of 1.2mm adapts to the wide field of view required in the horizontal direction of the eye, while a minor axis of 1.0mm adapts to the narrow field of view in the vertical direction. This reduces aberration differences in the horizontal / vertical directions, making the change in optical refractive index in the transition zone smoother and conforming to the visual perception patterns of the human eye.

[0014] Furthermore, the distance between opposite sides of the microstructures of the middle and outer rings is 1.10-1.15 mm.

[0015] Through the above technical solution, this application limits the distance between opposite sides of the hexagonal microstructures in the middle and outer rings to 1.10-1.15mm, thereby balancing the fill rate, structural strength, and defocusing effect. Setting the distance between opposite sides within the range of 1.10-1.15mm serves several purposes: First, it closely matches the size of the elliptical microstructure in the inner ring, ensuring uniform density connection between the inner, middle, and outer rings and avoiding optical jumps caused by sudden changes in local density. Second, this range allows the fill rate of the hexagon to remain stable within the target range; if the distance between opposite sides is too small, the microstructure is prone to breakage, while if it is too large, the fill rate decreases, resulting in intermittent defocusing. Third, this size is suitable for the lens's in-coating engraving process, allowing for direct processing on the substrate by placing the microlens within the coating layer on the outer surface of the lens, followed by hardening coating. This differs from other brands that damage the substrate by laser dotting the coating layer. This eliminates micro-protrusions on the lens surface, resulting in a more uniform coating and better coating stability and wear resistance. Simultaneously, the microlens remain undamaged, ensuring stable operation and a longer-lasting effect.

[0016] Furthermore, the filling rate of the microstructures in the middle and outer rings is 42%-45%.

[0017] Through the above technical solution, this application clarifies that the filling rate of the hexagonal microstructure in the middle and outer rings is 42%-45%. By improving the filling rate, the defocus uniformity is enhanced, solving the "defocus gap" problem of traditional defocus lenses. The optimized filling rate improves the coverage of the defocus area in the middle and outer rings, with no obvious "defocus blind zone", balancing control effect and visual experience.

[0018] Furthermore, the number of microstructures in the 10-ring microstructure is as follows: 31, 45, 59, 73, 87, 101, 115, 129, 144, and 159.

[0019] Through the above technical solution, this application limits the number of 10 microstructure rings to ensure that the defocus intensity of each ring is uniform and avoids local over-density or under-density. The reasonable incremental design of the number makes the inner ring density moderate and avoids the transition area from being "too dense to cause large aberrations". The density of the middle ring matches the ring diameter of the outer ring, and there is no phenomenon of weak defocus caused by being too sparse.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. This application addresses the fit defects caused by the "fixed defocus amount" of traditional defocus lenses by using a gradient defocus design in the inner, middle, and outer rings to achieve the goal of "no discomfort for low-degree users and sufficient control for high-degree users": low-degree myopia users can avoid visual distortion and eye fatigue caused by excessive defocus, high-degree myopia users can reduce the annual growth rate of the axial length through strong defocus amount, and moderate-degree myopia users can achieve a balance between control and comfort. At the same time, the defocus amount of each ring is smoothly connected, reducing optical jumps and improving visual continuity. 2. This application breaks through the limitations of traditional circular microstructures: the inner circle adopts an elliptical shape to adapt to the difference in horizontal / vertical field of vision of the eyeball, so that the visual transition from the center to the periphery is seamless and visual comfort is improved; the middle and outer circles adopt regular hexagonal microstructures, which increases the fill rate to 42%-45%, eliminates "intermittent defocus areas", improves the continuity of defocus coverage, and at the same time maintains good light transmittance, taking into account both defocus control effect and central object clarity; 3. This application ensures practicality in production and use based on performance optimization: the inner elliptical size is similar to the original circular parameters, and the number of 10 microstructures increases with diameter. Existing production lines and molds can be used, improving production yield and reducing modification costs. The hexagonal structure has better impact resistance than the circular structure, the elliptical transition area reduces the feeling of foreign objects on the nose, and the defocus error of different batches of lenses is small, extending the lens life. It is suitable for mass production and improves the long-term wearing experience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an annular gradient defocus lens in one embodiment of this application; Explanation of reference numerals in the attached diagram: 1. Lens body; 2. Inner ring; 3. Middle ring; 4. Outer ring. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0023] This application discloses an annular gradient defocus lens.

[0024] Reference Figure 1 A ring-shaped gradient defocus lens includes a lens body 1. At the geometric center of the lens body 1, there is a circular myopia correction zone with a diameter of 10.1 mm. The correction zone is directly connected to 10 concentric defocus microstructure rings. The inner radius of the first microstructure ring completely coincides with the outer radius of the myopia correction zone. According to the position from the inside to the outside, the first to third rings are divided into inner rings 2, the fourth to seventh rings are middle rings 3, and the eighth to tenth rings are outer rings 4. The rings are arranged in a concentric nested manner, and the center of the circle is consistent with the center of the myopia correction zone.

[0025] The microstructures in inner circle 2 are elliptical with a major axis of 1.2 mm and a minor axis of 1.0 mm. The number of microstructures in the three circles are 31, 45, and 59 respectively, with a spacing of 2.54 mm between the circles. The microstructures in middle circle 3 and outer circle 4 are all regular hexagonal with a side-to-side distance of 1.10-1.15 mm. The number of microstructures in circles 4-8 are 73, 87, 101, 115, and 129 respectively, with a spacing of 2.54 mm between the circles. The number of microstructures in circles 9-10 are 144 and 159 respectively, with a spacing of 2.72 mm between the circles. All microstructures are evenly distributed within their respective circles. The elliptical and regular hexagonal structures are adapted to the positional and functional requirements of the transition area of ​​inner circle 2 and the control area of ​​middle and outer circle 4, respectively.

[0026] The defocus amount of the microstructures in each ring increases gradually according to their position: the defocus amount of the inner ring 2 is +3.50D to +4.00D, the defocus amount of the middle ring 3 is +4.00D to +5.00D, and the defocus amount of the outer ring 4 is +5.00D to +6.00D. The defocus amount corresponds one-to-one with the position of the ring. The fill rate of the regular hexagonal microstructures in the middle ring 3 and the outer ring 4 is 42%-45%, and the adjacent regular hexagons are seamlessly spliced ​​and distributed without gaps.

[0027] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ring-shaped gradient defocus lens, characterized in that, The lens body (1) includes a lens body (1) on which multiple concentric defocus microstructure rings are nested from the inside out. The lens body (1) has a myopia correction area at its geometric center. The first to third rings from the inside out are designated as the inner ring (2), the fourth to seventh rings as the middle ring (3), and the eighth to tenth rings as the outer ring (4). The defocus amount of the inner ring (2), middle ring (3), and outer ring (4) increases in a gradient. The defocusing amount of the inner ring (2) is +3.50D to +4.00D, the defocusing amount of the middle ring (3) is +4.00D to +5.00D, and the defocusing amount of the outer ring (4) is +5.00D to +6.00D; The microstructure of the inner ring (2) is elliptical, and the microstructure of the middle ring (3) and the outer ring (4) is regular hexagonal.

2. The annular gradient defocus lens according to claim 1, characterized in that, The major axis of the elliptical microstructure of the inner ring (2) is 1.2 mm and the minor axis is 1.0 mm.

3. The annular gradient defocus lens according to claim 1, characterized in that, The distance between opposite sides of the microstructures of the middle ring (3) and the outer ring (4) is 1.10-1.15 mm.

4. The annular gradient defocus lens according to claim 1, characterized in that, The filling rate of the microstructures in the middle ring (3) and outer ring (4) is 42%-45%.

5. The annular gradient defocus lens according to claim 1, characterized in that, The number of microstructures in the 10-ring microstructure is as follows: 31, 45, 59, 73, 87, 101, 115, 129, 144, and 159.

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