Astigmatic lens and glasses

Abstract

The astigmatic lens comprises a central area and a peripheral area, the peripheral area is arranged around the central area, and the radial size of the central area is larger than that of the peripheral area; the central area is provided with an astigmatism cylindrical lens, the peripheral area is provided with a plurality of micro cylindrical lenses in array arrangement, the diopters of the micro cylindrical lenses gradually change along different meridian directions, and the difference between the diopters of the micro cylindrical lenses and the diopter of the central area is gradually increased in the direction far away from the central area. And the diopter of each micro-cylindrical lens is smaller than that of the central area. Furthermore, the micro-cylindrical lenses are arranged in the peripheral area of the astigmatic lens, sudden change of the diopter of the original astigmatic lens is relieved through gradual change of the diopter of the micro-cylindrical lenses, and the magnification difference generated by the astigmatic lens at the edge is reduced, so that visual distortion is reduced, and when a wearer wears the astigmatic lens, the astigmatic lens is more comfortable to wear. The dizziness feeling of a wearer can be reduced, and the experience of the wearer is improved.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, in particular to an astigmatism lens and glasses. Background Art

[0002] The astigmatism correction lenses (cylindrical lenses) worn by patients with astigmatism have different refractive powers in the two main meridian directions. This means that when observing objects through the lenses, the magnification in different directions is different. This difference in magnification is particularly obvious in the peripheral areas of the lenses, causing the image of objects at the edge of the field of vision to be stretched or compressed. This distortion is particularly severe for patients with higher astigmatism (for example, astigmatism ≥1.5D). When the wearer turns their head or turns quickly, the surrounding environment will produce a noticeable sense of distortion or instability in the field of vision, which is often described as a "swimming" effect or visual distortion. In the long term, this visual distortion can cause dizziness, vertigo and other discomforts in the wearer, increase the burden on the brain to adapt to vision, and even affect the sense of balance and safety during daily walking.

[0003] The current traditional solution primarily aims to reduce distortion by reducing the corrected astigmatism, allowing the patient's brain to gradually adapt to the residual visual distortion. However, this approach requires a long adaptation period, and a significant number of patients with high astigmatism never fully adapt, resulting in inadequate astigmatism correction. While some improved lens designs (such as asymmetric aspheric lenses or free-form surface technology) can optimize the distribution of aberrations across the field of view to a certain extent, there remains a lack of a proven, fundamental solution to the peripheral distortion caused by high astigmatism. Summary of the Invention

[0004] The present invention provides an astigmatism lens and glasses to solve the dizziness or vertigo that easily occurs when the wearer wears the astigmatism lens in the related art, thereby improving the wearer's experience.

[0005] According to one aspect of the present invention, there is provided an astigmatism lens, comprising: a central region and a peripheral region, wherein the peripheral region is arranged around the central region, and a radial dimension of the central region is greater than a radial dimension of the peripheral region;

[0006] The central area is arranged with an astigmatism cylindrical lens, and the peripheral area is arranged with a plurality of micro-cylindrical lenses arranged in an array. The refractive power of each micro-cylindrical lens gradually changes along different meridian directions. In the direction away from the central area, the difference between the refractive power of each micro-cylindrical lens and the refractive power of the central area gradually increases, and the refractive power of each micro-cylindrical lens is smaller than the refractive power of the central area.

[0007] Optionally, one side surface of the astigmatism cylindrical lens is spherical or aspherical, and the other side surface is cylindrical or toric.

[0008] Optionally, the micro-cylindrical lenses are closely arranged.

[0009] Optionally, the shape of each of the micro-cylindrical lenses is a polygon or a curved polygon.

[0010] Optionally, edges between adjacent micro-cylindrical lenses are connected by smooth transition.

[0011] Optionally, edges between adjacent micro-cylindrical lenses are smoothly connected by a NURBS free-form surface.

[0012] Optionally, the radial dimension of each of the micro-cylindrical lenses is 1-2 mm.

[0013] Optionally, the deviation angle between the cylindrical axis of each of the micro-cylindrical lenses and the cylindrical axis of the astigmatism cylindrical lens is within a preset range.

[0014] Optionally, the cylindrical axis of each of the micro-cylindrical lenses is consistent with the cylindrical axis of the astigmatism cylindrical lens.

[0015] According to another aspect of the present invention, a pair of glasses is provided, comprising the astigmatism lens according to any embodiment of the present invention.

[0016] According to an embodiment of the present invention, an astigmatic lens and glasses are proposed, wherein the astigmatic lens includes: a central area and a peripheral area, the peripheral area is arranged around the central area, and the radial size of the central area is larger than the radial size of the peripheral area; the central area is arranged with astigmatic cylindrical lenses, and the peripheral area is arranged with a plurality of micro-cylindrical lenses arranged in an array, the refractive power of each micro-cylindrical lens gradually changes along different meridian directions, and in the direction away from the central area, the difference between the refractive power of each micro-cylindrical lens and the refractive power of the central area gradually increases, and the refractive power of each micro-cylindrical lens is smaller than the refractive power of the central area. Furthermore, by arranging micro-cylindrical lenses in the peripheral area of ​​the astigmatic lens, the sudden change in the refractive power of the original astigmatic lens is alleviated by the gradual change in the refractive power of the micro-cylindrical lenses, and the difference in magnification generated at the edge of the astigmatic lens is reduced to reduce visual distortion, so that when the wearer wears the astigmatic lens, the wearer's feeling of dizziness can be reduced, and the wearer's experience can be improved.

[0017] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 2 is a schematic structural diagram of an astigmatism lens according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] Figure 1 Schematic diagram of the structure of the astigmatism lens proposed according to an embodiment of the present invention. Figure 1 As shown, the astigmatism lens comprises: a central area 101 and a peripheral area 102, wherein the peripheral area 102 is arranged around the central area 101, and the radial size of the central area 101 is larger than the radial size of the peripheral area 102;

[0023] The central region 101 is provided with astigmatism lenticular lenses, and the peripheral region 102 is provided with a plurality of arrayed micro-lenticular lenses 103. The refractive power of each micro-lenticular lens 103 gradually changes along different meridian directions. In the direction away from the central region 101, the difference between the refractive power of each micro-lenticular lens 103 and the refractive power of the central region 101 gradually increases, and the refractive power of each micro-lenticular lens 103 is smaller than the refractive power of the central region 101.

[0024] It should be noted that the astigmatism diopter in astigmatism lenses is generally integrated into myopia or hyperopia glasses. Astigmatism lenses are generally astigmatism cylinders. For example, when the diopter of the astigmatism cylinder is -4.00D and the cylinder axis is 90°, it means that 4 diopters of vertical astigmatism need to be corrected. Since the magnification difference between the edge of the astigmatism cylinder, i.e., the peripheral area 102, and the central area 101 is relatively obvious, the image of the object at the edge is stretched or compressed, causing the wearer to feel dizzy or vertigo when turning the head or turning around. In the present invention, the peripheral area 102 of the central area 101 is provided with an array of micro-cylindrical lenses 103, so that the original overall diopter of the peripheral area 102 is broken up. By gradually changing the diopter of multiple micro-cylindrical lenses 103, the sudden change in the original overall diopter of the peripheral area 102 is alleviated, thereby solving the dizziness when the wearer turns his head or turns around, improving the clarity of the wearer's observation of peripheral vision, and reducing the distortion of peripheral vision.

[0025] It is understood that if the astigmatism lens is circular, the central region 101 (approximately 15-20 mm in diameter) of the astigmatism lens utilizes a traditional astigmatism cylindrical design to provide accurate astigmatism correction. Meanwhile, the peripheral region 102 (from approximately 20-30 mm in diameter outward, approximately 10 mm in width) of the astigmatism lens is provided with a micro-cylindrical array. This ensures both astigmatism correction performance and reduced vertigo. Avoid placing micro-cylindrical lenses too close to the center, where they may affect proper astigmatism correction, or too close to the edges, where they may not provide the desired effect.

[0026] In the direction from the central region 101 to the peripheral region 102, i.e., in the radial direction, the refractive power of each micro-lenticular lens 103 varies slightly. This gradient optical property of the micro-lenticular lens array achieves a gradual transition of magnification in different meridian directions, reducing the magnification differences at the edges of conventional astigmatic lenses. Since the steeper the curvature of an astigmatic lens, the greater the refractive power, while the flatter the curvature, the smaller the refractive power, the curvature of the astigmatic lens gradually flattens from the center to the edge. Consequently, the refractive power of each micro-lenticular lens 103 is smaller than that of the central region 101. Furthermore, in the radial direction of the astigmatic lens, the refractive power of micro-lenticular lenses 103 closer to the central region 101 is closer to that of the central region 101, while the difference between the refractive power of micro-lenticular lenses 103 and the central region 101 is greater for micro-lenticular lenses 103 farther from the central region 101. This reduces edge aberrations and reduces the weight and thickness of the astigmatic lens.

[0027] Optionally, one side surface of the astigmatism cylindrical lens is a spherical surface or an aspherical surface, and the other side surface is a cylindrical surface or a toric surface.

[0028] It is understood that central region 101 is an astigmatism cylindrical lens. If one surface of the astigmatism cylindrical lens is spherical or aspherical, it can be used as a myopia or hyperopia lens. If the other surface is cylindrical or toric, it can be used as an astigmatism correction lens. This allows the astigmatism correction function to be superimposed on a myopia or hyperopia lens. A toric lens has two mutually perpendicular radii of curvature (one direction has refractive power, the other direction has different or zero refractive power), and is primarily used to correct astigmatism.

[0029] Specifically, central region 101 utilizes a traditional cylindrical astigmatism correction design, where one lens surface is spherical or aspherical, while the other is cylindrical (or an appropriately curved surface) to provide the desired astigmatism correction. Within this region, the optical performance of the lens is comparable to that of a conventional astigmatism lens, ensuring clear and accurate corrected vision within the wearer's primary field of vision. The dimensions of central region 101 (approximately 15-20 mm in diameter) cover the primary visual field used by the average eye during quiet focus, so providing complete astigmatism correction in this region is sufficient to meet most daily visual needs.

[0030] Optionally, the micro-cylindrical lenses 103 are closely arranged.

[0031] Among them, continue to refer to Figure 1 , a micro-lenticular array structure is introduced in the peripheral annular zone (i.e., the periphery) of the optical zone of the astigmatic lens. This array is composed of a dense mosaic of micro-lenticules with diameters ranging from 0.8 to 3 mm, each of which is a small toroidal cylindrical lens. The micro-lenticules are arranged in a two-dimensional array on the lens surface, with no overlap or only minimal gaps between adjacent micro-lenticules. This ensures that the entire periphery is covered by these micro-lenticules, leaving no exposed base lens surface. Micro-lenticules at different positions in the array can be designed to have slightly different cylindrical refractive powers or axial orientations, with this variation following a gradual transition from the center to the edge of the lens. In other words, the optical magnification of micro-lenticules closer to the edge of the lens decreases compared to the central zone, thereby compensating for the sharp change in magnification at the periphery of the field of view in traditional designs.

[0032] Optionally, the shape of each micro-cylindrical lens 103 is a polygon or a curved polygon.

[0033] In one embodiment, each micro-cylindrical lens 103 is closely arranged and can be laid out in a relatively regular manner or in a relatively random distribution manner. When arranged in a relatively regular manner, such as using an equilateral triangle, a regular quadrilateral, or a pentagon and a hexagon, the base lens will not be exposed after the array micro-cylindrical lens 103 is arranged, which is conducive to optical simulation and can simplify the modeling and CNC processing process. When laid out in a relatively random distribution manner, the shapes of each micro-cylindrical lens may be different with a high probability, which is not conducive to simulation or CNC processing and does not have periodicity, but can better break up the refractive power of the surrounding area 102 and improve visual comfort.

[0034] The polygons are formed of straight lines, and the curved polygons are formed of curves. For example, the arrangement can be made using micro-lenticular lenses 103 that are solely polygonal, solely curved, or both. This allows for better adaptation to different lens shapes and allows for tighter arrangement, minimizing exposure of the underlying lens.

[0035] Optionally, edges of adjacent micro-cylinders 103 are connected by smooth transition.

[0036] In one embodiment, the edges of adjacent micro-lenticular lenses 103 are smoothly connected by a NURBS free-form surface. To avoid visual discontinuity, the edges of each micro-lens unit are smoothly connected by a NURBS free-form surface, resulting in a virtually continuous free-form optical surface across the entire periphery, yet exhibiting locally differentiated optical refractive power at the microscopic level. This design ensures that as the wearer's gaze shifts toward the periphery of the lens, the image size changes gradually and smoothly, without sudden, exaggerated stretching or compression.

[0037] Smooth transition means that at the junction of adjacent micro-cylinders, instead of simply intersecting their respective curved surfaces directly (which would form ridges or steps), mathematical methods are used to allow the surfaces of the two units to gradually transition and blend in the boundary area.

[0038] This process allows the surface of the manufactured lens to exhibit a seamless, continuous curvature, even though the microlenticular array is designed to be composed of numerous microlenticular lenses. The wearer will not perceive any dividing lines or steps, visually equivalent to a single, continuous optical surface. This smooth curve transition also prevents light scattering or sudden aberrations at cell boundaries, ensuring image stability as the eye scans across each cell.

[0039] To avoid optical abrupt changes or mechanical seams between micro-lenticules, a continuous optical surface transition method is required. Specifically, at the boundaries between adjacent micro-lenticules, a smooth transition of curvature is achieved by using methods such as NURBS (Non-Uniform Rational B-Splines) surface modeling. This ensures that, despite being composed of numerous small units, the entire lens surface remains a smooth, continuous surface at a macroscopic level. The wearer will not notice the unit boundaries, thus preventing scattering or sudden aberrations.

[0040] NURBS surface modeling can be used to generate smooth transition surfaces between continuous optical surfaces. Given the curvature conditions of adjacent regions, control points and weights are set to ensure that the transition surface satisfies the boundary conditions of the microlenses on both sides and achieves a smooth connection.

[0041] Among them, the NURBS surface is defined by two parameters (u, v), and the expression is:

[0042] ,in, are the coordinates of the control points, is the weight of the corresponding control point, 、 :Respectively Second-rate Spline basis function. Among them, The spline basis function is a piecewise polynomial function defined by the knot vectors, which determines the shape of the surface within the parameter interval. is the number of control point grids in space. . u, v are the curvature conditions of adjacent areas.

[0043] Optionally, the radial dimension of each micro-cylindrical lens 103 is 1-2 mm.

[0044] In other words, the specific parameters of the micro-lenticular array must be determined during the design process, including the size, shape, arrangement density, and diopter distribution of the micro-lenticular units. For example, the selection of the micro-lenticular diameter requires a comprehensive consideration of both optical quality and smoothness: larger micro-lenticular units (approximately 3mm) can reduce the number of units and simplify manufacturing, but may result in less delicate array transitions; while excessive numbers of smaller micro-lenticular units (approximately 1mm or less) can increase manufacturing complexity and result in excessive edge transitions. A preferred embodiment employs a micro-lenticular diameter of approximately 1-2mm to achieve a balance between optical gradient and smooth manufacturing.

[0045] Optionally, the deviation angle between the axial direction of each micro-lenticular lens 103 and the axial direction of the astigmatism lenticular lens is within a preset range. Optionally, the axial direction of each micro-lenticular lens 103 is consistent with the axial direction of the astigmatism lenticular lens.

[0046] Among them, the preset range can be 0°±a, wherein, for every 1 degree of deviation of astigmatism, the astigmatism correction effect will lose about 3% to 3.3%. When the deviation reaches 30 degrees, the effect of correcting astigmatism will completely disappear. Therefore, a=30°, preferably 15°. In other embodiments, the value of a can be set according to actual conditions. That is to say, the cylindrical axis of the micro-cylindrical lens needs to be consistent with the cylindrical axis of the overall lens or adjusted within a certain range to ensure that the imaging transition in all directions is natural. For example, if the total astigmatism axis of the lens is horizontally 0°, the cylindrical axes of all peripheral microlenses are roughly parallel to the 0° axis, but may be slightly rotated and adjusted in different radial directions to achieve balanced correction of distortion in each meridian direction in conjunction with the change in refractive power.

[0047] Thus, embodiments of the present invention employ a micro-lenticular array in the peripheral region 102. This array gradually transitions the magnification differences between different meridian directions of the lens, significantly reducing the image distortion caused by conventional high-astigmatism lenses in the peripheral regions. When viewing objects through the periphery of the lens, the wearer experiences significantly reduced distortion, with straight lines and object shapes in the field of view appearing closer to reality, without noticeable distortion or shakiness. Due to the reduced peripheral vision distortion, patients with high astigmatism can adapt more easily to wearing the lenses of the present invention, thereby alleviating discomfort symptoms such as dizziness and nausea caused by aberrations. Compared to conventional approaches that require reducing astigmatism to alleviate distortion, the present invention provides adequate astigmatism correction while maintaining a high level of comfort, shortening the adaptation time and improving lens acceptance. Reduced geometric distortion in the peripheral field of view enhances the wearer's spatial perception of the environment, eliminating the unrealistic perception of tilted or undulating terrain caused by the excessive magnification effect at the lens's edges. This is particularly important for daily walking or climbing stairs. The lenses of the present invention can help the wearer maintain a better sense of balance and orientation, enhancing safety. This invention retains a traditional astigmatism design in the central area, ensuring that vision correction within the primary field of vision remains intact. The introduction of a peripheral microlens array does not compromise the optical performance of the central visual area, thereby striking a balance between vision correction effectiveness and visual comfort. Furthermore, this invention significantly improves the visual experience while fully correcting vision, offering advantages unattainable with traditional astigmatism lenses and providing a novel corrective lens option for patients with high astigmatism.

[0048] In a specific embodiment, Figure 1 The figure shows the division between the central area of ​​the lens and the surrounding micro-lenticular array area. The central optical zone (15-20mm diameter) is marked by a dotted circle in the figure, which uses a traditional lenticular design. The annular area outside the dotted circle is the surrounding area covered by the micro-lenticular array.

[0049] Lens Prescription Setting: Based on the patient's vision prescription, the basic lens parameters are determined. For example, the spherical power S and cylindrical power C are set (assuming C = -4.00D, with an axial angle of 90°, indicating a 4-diopter vertical astigmatism correction). Based on this prescription, the radius of curvature of a traditional cylindrical lens in the central area can be calculated (or a central cylindrical surface can be generated using optical design software) to ensure accurate S and C correction within the central 15-20mm diameter range.

[0050] Micro-lenticular array parameter design: Determine the configuration strategy for the peripheral micro-lenticular array. First, the diameter of the micro-lenticular units is selected. In this embodiment, micro-lenticular units with a diameter of approximately 2 mm are used to strike a balance between the optical gradient effect and manufacturing difficulty. These micro-lenticular units are laid out in a ring around the edge of the lens (approximately 10-15 mm in radius). Using optical design software, a digital model of the lens surface is created: starting from the boundary of the central region, the micro-lenticular units are placed layer by layer around the periphery. The cylindrical power of each micro-lenticular unit is slightly lower than the central prescription's cylindrical power (C), gradually decreasing to a lower value at the lens' periphery. For example, the cylindrical power of the first ring of micro-lenticular units immediately adjacent to the central region may be -3.75D (slightly lower than the central -4.00D), decreasing to -3.50D in the next ring, and then gradually decreasing outward until the outermost micro-lenticular units reach approximately -2.00D. The axial direction can be fine-tuned as needed, but the overall angle remains 90° to the main axis to ensure a smooth transition in astigmatism correction strength. This diopter reduction scheme can be automatically generated by an algorithm to form a three-dimensional free-form surface that changes smoothly from the center to the edge.

[0051] Surface Transition: To avoid optical discontinuities at the boundaries between micro-lenticular units, a NURBS surface algorithm is used in the digital model to smoothly fit the interface between adjacent micro-lenticular units. Specifically, a transition surface is generated at the edge of two adjacent micro-lenticular units. The curvature of this surface maintains continuity in its first- and second-order derivatives (i.e., continuous slope and curvature) when connecting the two micro-lenticular units, resulting in no creases on the optical surface. This free-form surface transition design can be accomplished through computer-aided design, generating a precise numerical description of the entire lens surface.

[0052] Mold making or direct processing: Based on the three-dimensional surface data of the lens designed above, select the appropriate manufacturing process to realize the solid lens. There are two feasible ways:

[0053] Mold Manufacturing and Casting: Ultra-precision machining equipment (such as a single-point diamond lathe) is used to lathe the negative surface of the lens (i.e., the mold surface is engraved with the microlens array structure opposite to the lens surface) from the metal mold blank. Diamond turning technology can reproduce complex free-form surfaces with nanometer-level surface roughness accuracy, including the fine structure of the microlenticular array. After mold processing is completed, an optical resin (such as CR-39 resin or a high-refractive-index resin material) is injected or cast into the mold to form the lens. After curing, the finished lens is removed, and its surface bears the designed microlenticular array structure.

[0054] Direct CNC machining: Free-form surface machining is performed directly on a lens blank (e.g., a resin lens blank or a glass lens blank). Using a five-axis CNC grinder or laser processing equipment, the micro-cylindrical array and central cylindrical region are engraved onto the surface of the lens blank according to the designed CNC code. To achieve an optical-grade surface, ultra-precision machining (UP machining) or simultaneous polishing is typically required. Because the surface of the lens of this invention contains numerous micron-scale unit structures, conventional polishing can diminish these details. Therefore, high-precision methods such as abrasion-free fine turning or ion beam polishing are more suitable for directly achieving a smooth surface.

[0055] Coating and Assembly: After processing, lenses typically undergo conventional optical coating, such as anti-reflection (AR) coating and scratch-resistant hardening. It's worth noting that the micro-lenticular array structure may place higher demands on the coating process, ensuring that the coating thickness is uniform across the microstructure surface and does not fill in the micro-lenticular details. Finally, the finished lenses are assembled into frames to form finished glasses. Inspection confirms that their optical parameters meet design requirements and provide a good wearing experience.

[0056] Through the above steps, the microlens array-based astigmatism lens of the present invention is manufactured. Actual wear tests demonstrate that the lens provides clear astigmatism correction in the central field of view while effectively reducing image distortion in the peripheral field of view. Wearers quickly adapt to the lens, with subjective feedback indicating more stable and natural peripheral vision. This demonstrates the effectiveness and superiority of the present invention's design.

[0057] Therefore, the astigmatism lens proposed in the embodiments of the present invention reduces visual distortion through a unique lens peripheral structure while ensuring precise correction of astigmatism in the central visual area. Specifically, the central region of the lens (approximately 15-20 mm in diameter) utilizes a traditional astigmatism cylindrical design to provide accurate astigmatism correction. In contrast, the peripheral region of the lens (from approximately 20-30 mm in diameter) incorporates an array structure composed of numerous tiny lenticular units. Each micro-lenticular unit is an independent toric lenticular lens (i.e., a micro-lens with astigmatism). These micro-lenticular units are closely arranged around the periphery of the lens, with slightly varying diopters within the array. The gradient optical properties of this micro-lenticular array achieve a gradual transition in magnification across different meridian directions, minimizing the magnification variations at the edges of traditional astigmatism lenses. Furthermore, non-uniform rational B-spline (NURBS) curves are used for transitions between micro-lenticules, ensuring a smooth optical connection at the intersection of adjacent micro-lenticules, avoiding ridges or step-like discontinuities and thus preventing significant visual interference.

[0058] According to another aspect of the present invention, a pair of glasses is provided, comprising the astigmatism lens according to any embodiment of the present invention.

[0059] In summary, according to the astigmatism lens and glasses proposed in the embodiments of the present invention, the astigmatism lens includes: a central area and a peripheral area, the peripheral area is arranged around the central area, and the radial size of the central area is larger than the radial size of the peripheral area; the central area is arranged with astigmatism cylindrical lenses, and the peripheral area is arranged with a plurality of micro-cylindrical lenses arranged in an array, the refractive power of each micro-cylindrical lens gradually changes along different meridian directions, and in the direction away from the central area, the difference between the refractive power of each micro-cylindrical lens and the refractive power of the central area gradually increases, and the refractive power of each micro-cylindrical lens is smaller than the refractive power of the central area. Furthermore, by arranging micro-cylindrical lenses in the peripheral area of ​​the astigmatism lens, the sudden change in the refractive power of the original astigmatism lens is alleviated by the gradual change in the refractive power of the micro-cylindrical lenses, and the difference in magnification generated at the edge of the astigmatism lens is reduced to reduce visual distortion, so that when the wearer wears the astigmatism lens, the wearer's feeling of dizziness can be reduced, thereby improving the wearer's experience.

[0060] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. An astigmatism lens, characterized in that: include: a central area and a peripheral area, wherein the peripheral area is arranged around the central area, and a radial dimension of the central area is larger than a radial dimension of the peripheral area; The central area is arranged with an astigmatism cylindrical lens, and the peripheral area is arranged with a plurality of micro-cylindrical lenses arranged in an array. The refractive power of each micro-cylindrical lens gradually changes along different meridian directions. In the direction away from the central area, the difference between the refractive power of each micro-cylindrical lens and the refractive power of the central area gradually increases, and the refractive power of each micro-cylindrical lens is smaller than the refractive power of the central area.

2. The astigmatism lens according to claim 1, wherein: One side surface of the astigmatism cylindrical lens is a spherical surface or an aspherical surface, and the other side surface is a cylindrical surface or a toric surface.

3. The astigmatism lens according to claim 1, wherein: The micro-cylindrical lenses are closely arranged.

4. The astigmatism lens according to claim 3, wherein: The shape of each micro-cylindrical lens is a polygon or a curved polygon.

5. The astigmatism lens according to claim 1, wherein: The edges of adjacent micro-cylindrical lenses are connected in a smooth transition.

6. The astigmatism lens according to claim 5, characterized in that: The edges between adjacent micro-cylindrical lenses are smoothly connected by a NURBS free-form surface.

7. The astigmatism lens according to claim 1, wherein: The radial dimension of each micro-cylindrical lens is 1-2 mm.

8. The astigmatism lens according to claim 1, wherein: The deviation angle between the cylindrical axis of each of the micro-cylindrical lenses and the cylindrical axis of the astigmatism cylindrical lens is within a preset range.

9. The astigmatism lens according to claim 7, wherein: The cylindrical axis of each of the micro-cylindrical lenses is consistent with the cylindrical axis of the astigmatism cylindrical lens.

10. A pair of glasses, characterized in that: The astigmatism lens comprises the astigmatism lens according to any one of claims 1 to 9.

Images