Lens and glasses with hybrid microstructure design combining functions of defocus and point spread

Abstract

A lens and eyeglasses with a hybrid microstructure design combining defocus and dot diffusion functions are disclosed. This solves the problem of existing myopia control lenses having only one function. It includes a frame and a lens with a hybrid microstructure design combining defocus and dot diffusion functions. The lens with the hybrid microstructure design includes: a front surface with multiple microlenses forming a myopia defocus area, each microlens having an additional refractive power +1.5D to +6.0D higher than the lens's base refractive power; and a rear surface with a light diffusion area, which is a dot diffusion structure formed by a frosted surface treatment. The myopia defocus area and the light diffusion area at least partially overlap within a field of vision based on the lens center. This invention innovatively combines the front surface defocus design and the rear surface contrast control design, with the two mechanisms working synergistically, resulting in a significantly better myopia control effect than a single-mechanism design.

Description

Technical Field

[0001] This utility model relates to the field of ophthalmic optics technology, specifically to a lens and eyeglasses with a hybrid microstructure design that combines defocusing and dot diffusion functions. Background Technology

[0002] Currently, optical interventions for myopia prevention and control are mainly based on two mechanisms: one is to inhibit axial elongation by forming a myopia defocus signal in front of the retina; the other is to slow down the progression of myopia by regulating the contrast of retinal imaging.

[0003] Most existing myopia control lenses employ a single-mechanism design. Microlens array lenses use multiple tiny convex lenses on the lens surface to focus some light in front of the retina, creating a myopia defocus signal. While this design can effectively inhibit axial elongation, there is still room for improvement in its control effect. On the other hand, contrast-modulated lenses reduce the imaging contrast in specific areas through special surface treatments, but lack direct defocus stimulation, resulting in limited control effects.

[0004] Currently, there are no lens products on the market that can simultaneously integrate both myopia control mechanisms. Simple defocus design may not provide optimal control, while simple contrast adjustment can negatively impact visual quality. Therefore, there is an urgent need to develop a new type of composite functional lens that can synergistically combine both control mechanisms to provide superior myopia control while maintaining visual quality. Utility Model Content

[0005] To address the problem of limited functionality in existing anti-smoothness lenses in the background art, this invention provides a lens and eyeglasses with a hybrid microstructure design that combines defocusing and dot diffusion functions.

[0006] The technical solution of this utility model is: a lens with a hybrid microstructure design that combines defocusing and dot diffusion functions, comprising: The front surface is provided with multiple microlenses, and different microlenses form a myopia defocus area. The microlenses have an additional refractive power of +1.5D to +6.0D higher than the basic refractive power of the lens. The rear surface is provided with a light diffusion area, which is a dot diffusion structure formed by surface frosting treatment; the myopia defocus area and the light diffusion area at least partially overlap within the field of vision with the center of the lens as the reference.

[0007] As a further improvement of this utility model, the multiple microlenses on the front surface are distributed in an annular area with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center.

[0008] As a further improvement of this utility model, multiple microlenses are arranged in a ring, and each ring of microlenses forms a myopia defocus area; the distribution density of microlenses in different rings decreases gradually from the center of the lens outwards.

[0009] As a further improvement of this utility model, the spacing between adjacent microlenses near the center is 0.1-0.5 mm, and the spacing between adjacent microlenses near the outer edge is 0.5-1.5 mm; the distribution density of different microlenses is set in a gradient decreasing from the center of the lens outward.

[0010] As a further improvement of this utility model, the light diffusion area on the rear surface is distributed in an annular area with an inner diameter of 5mm to an outer diameter of 35mm centered on the lens center; the field of view of the overlapping part of the myopia defocus area and the light diffusion area is within an annular area with an inner diameter of 6mm to an outer diameter of 35mm based on the lens center.

[0011] As a further improvement of this utility model, the surface roughness Ra of the point diffusion structure is 0.1-1.0μm, and the height difference between the concave and convex parts is 5-50μm.

[0012] As a further improvement of this utility model, it also includes a central region that remains optically transparent and has a diameter of 6-8 mm.

[0013] As a further improvement of this utility model, the additional refractive power of the microlens is +2.5D to +5.0D.

[0014] As a further improvement of this utility model, the lens is integrally molded using CR-39, polycarbonate or MR series high refractive index materials.

[0015] Eyeglasses, comprising a frame and lenses with the aforementioned hybrid microstructure design combining defocus and dot diffusion functions.

[0016] The beneficial effects of this utility model are that it innovatively combines the front surface defocus design and the rear surface contrast control design, and the two mechanisms work together to achieve a significantly better myopia control effect than a single mechanism design; the two functional areas are spatially separated to avoid mutual interference of optical performance; and the dot diffusion structure is set on the rear surface to effectively reduce the problem of glare reflected from the front surface. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the structure of an ophthalmic lens according to an embodiment of the present invention.

[0018] Appendix Figure 2 This is a schematic diagram of the distribution of microlenses on the front surface of an ophthalmic lens according to an embodiment of the present invention.

[0019] Appendix Figure 3This is a schematic diagram of the light diffusion area distribution on the posterior surface of an ophthalmic lens according to an embodiment of this utility model.

[0020] Appendix Figure 4 This is a cross-sectional structural diagram of an ophthalmic lens according to an embodiment of the present invention.

[0021] In the figure, 1 is the front surface; 11 is the microlens; 111 is the myopic defocus area; 2 is the rear surface; 21 is the light diffusion area; 211 is the point diffusion structure; and 3 is the central area. Detailed Implementation

[0022] The embodiments of this utility model will be further described below with reference to the accompanying drawings: Depend on Figure 1 Combination Figure 2-4 As shown, an eyeglass includes a frame and a lens with a hybrid microstructure design that combines defocusing and dot diffusion functions. The lens with the hybrid microstructure design that combines defocusing and dot diffusion functions includes: The front surface 1 is provided with multiple microlenses 11, and different microlenses 11 form a myopia defocus region 111. The microlenses 11 have an additional refractive power of +1.5D to +6.0D higher than the basic refractive power of the lens. The rear surface 2 is provided with a light diffusion region 21, which is a dot diffusion structure 211 formed by surface frosting treatment; the myopia defocus region 111 and the light diffusion region 21 at least partially overlap within the field of vision with the center of the lens as the reference. The beneficial effects of this utility model are that it innovatively combines the front surface defocus design and the rear surface contrast control design, and the two mechanisms work synergistically, resulting in a significantly better myopia control effect than a single mechanism design; the two functional areas are spatially separated to avoid mutual interference of optical performance; the central optical area remains clear and transparent, without affecting the wearer's main visual quality; the dot diffusion structure is set on the rear surface, effectively reducing the problem of glare reflected from the front surface; this utility model can flexibly adjust the parameter combination of the two functional areas according to the needs of different wearers to achieve personalized customization.

[0023] The anterior surface 1 has multiple microlenses 11 distributed within a ring-shaped region with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center. Specifically, the microlenses 11 are arranged in a ring, with each ring forming a myopic defocus region 111; the distribution density of the different rings of microlenses 11 decreases gradually from the lens center outwards. More specifically, the spacing between adjacent rings of microlenses 11 near the center is 0.1-0.5 mm, and the spacing between adjacent rings of microlenses 11 near the outer edge is 0.5-1.5 mm. The distribution density of the different rings of microlenses 11 decreases gradually from the lens center outwards. More specifically, refraction is the phenomenon where light rays bend in their direction of propagation when they enter a medium with a different refractive index from one medium; it is an ophthalmological and optical term. Refractive power is a physical quantity in ophthalmology that measures the eye's ability to refract light, and its unit is diopter (D). In a normal refractive state (emmetropia), light rays pass through the cornea and lens, focusing accurately onto the retina to form a clear image. Abnormal refractive power leads to refractive errors, manifesting as myopia, hyperopia, or astigmatism. An eye exam is necessary to determine the specific degree of refractive error, which can then be corrected using glasses, contact lenses, or laser surgery. (See appendix) Figure 2 The microlenses on the front surface are preferably distributed in an annular region with an inner diameter of 9 mm to an outer diameter of 15 mm centered on the lens center, and the microlens density decreases gradually from the inside to the outside.

[0024] The light diffusion region 21 of the rear surface 2 is distributed within an annular region with an inner diameter of 5 mm to an outer diameter of 35 mm, centered on the lens center. The overlapping area of ​​the myopia defocus region and the light diffusion region is within an annular region with an inner diameter of 6 mm to an outer diameter of 35 mm, centered on the lens center. Specifically, the surface roughness Ra of the point diffusion structure 211 is 0.1-1.0 μm, and the height difference between its concavity and convexity is 5-50 μm. See Appendix Figure 3 The dot-diffusion frosted structure (light diffusion area) on the rear surface is preferably distributed within an annular region B with an inner diameter of 8 mm to an outer diameter of 20 mm, centered on the lens center. The frosted structure is a micro-uneven structure with a surface roughness Ra of 0.1-1.0 μm formed by precision sandblasting, and the height difference between the uneven structures is controlled within the range of 5-50 μm to ensure that it can effectively reduce contrast without causing significant visual interference.

[0025] This invention also includes a central region 3, which remains optically transparent and has a diameter of 6-8 mm. This ensures clear central focus. See attached diagram. Figure 4In the lens cross-sectional structure, the microlenses on the front surface and the frosted structure (light diffusion area) on the rear surface form a partially overlapping composite control area in space, achieving a composite function. The lens of this utility model is integrally molded using CR-39 (scientific name: propylene glycol carbonate, or allyl diethylene glycol carbonate), polycarbonate, or MR series high refractive index materials (MR series is a high-performance polyurethane resin material developed by Mitsui Chemicals of Japan).

[0026] Based on the path characteristics of light passing through different regions, the following further description is provided: Light L1 is focused directly onto the retina through the central region 3, resulting in clear vision; After passing through the microlens on the front surface, light L2 is focused in front of the retina, forming an effective myopic defocus signal; Light L3 undergoes controlled scattering after passing through the frosted structure (dot diffusion structure) on the rear surface, which moderately reduces the imaging contrast. The L4 light beam passes through both a microlens and a frosted structure, creating both defocus and reduced contrast, resulting in a synergistic control effect.

[0027] A method for manufacturing a lens with a hybrid microstructure design that combines defocusing and dot diffusion functions includes the following steps: Step 1: Form a lens blank by precision injection molding or turning. Step 2: Form a microlens array 11 on the front surface 1. The microlens array 11 is formed by photolithography or precision molding. Step 3: Perform precision sandblasting on a specific area of ​​the rear surface 2 to form a dot diffusion structure 211. The precision sandblasting uses alumina abrasive particles with a particle size of 50-100μm, a sandblasting pressure of 0.2-0.4MPa, and a sandblasting time of 30-60 seconds to ensure that the surface roughness Ra of the rear surface reaches 0.1-1.0μm. During the precision sandblasting, a mask is used to protect the untreated area. The mask is a 0.1mm thick stainless steel mask, which is attached to the rear surface of the lens by vacuum adsorption. The edge error of the mask corresponding to the untreated area is ≤0.05mm. Step 4: Perform surface coating and hardening treatment.

[0028] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.

Claims

1. A lens with a hybrid microstructure design combining defocusing and dot diffusion functions, characterized in that: include: The front surface (1) is provided with multiple microlenses (11), and different microlenses (11) form a myopic defocus area (111). The microlenses (11) have an additional refractive power of +1.5D to +6.0D higher than the basic refractive power of the lens. The rear surface (2) is provided with a light diffusion region (21), which is a dot diffusion structure (211) formed by surface frosting treatment; the myopia defocus region (111) and the light diffusion region (21) at least partially overlap within the field of view with the center of the lens as the reference. The multiple microlenses (11) of the front surface (1) are distributed in an annular region with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center; Multiple microlenses (11) are arranged in a ring, and each ring of microlenses (11) forms a myopia defocus area (111); the distribution density of different rings of microlenses (11) is set to decrease in a gradient from the center of the lens outward.

2. The lens with a hybrid microstructure design combining defocusing and dot diffusion functions as described in claim 1, characterized in that... The spacing between adjacent microlenses (11) near the center is 0.1-0.5 mm, and the spacing between adjacent microlenses (11) near the outer side is 0.5-1.5 mm; the distribution density of different microlenses (11) is set in a gradient decreasing from the center of the lens outward.

3. The lens with a hybrid microstructure design combining defocusing and dot diffusion functions as described in claim 1, characterized in that... The light diffusion area (21) of the rear surface (2) is distributed in an annular area with an inner diameter of 5 mm to an outer diameter of 35 mm centered on the lens center; the overlapping part of the myopia defocus area (111) and the light diffusion area (21) has a field of view within an annular area with an inner diameter of 6 mm to an outer diameter of 35 mm centered on the lens center.

4. The lens with a hybrid microstructure design combining defocusing and dot diffusion functions according to claim 3, characterized in that... The surface roughness Ra of the point diffusion structure (211) is 0.1-1.0 μm, and the height difference between the concave and convex parts is 5-50 μm.

5. The lens with a hybrid microstructure design combining defocusing and dot diffusion functions according to claim 1, characterized in that... It also includes a central region (3) that remains optically transparent and has a diameter of 6-8 mm.

6. The lens with a hybrid microstructure design combining defocusing and dot diffusion functions according to claim 1, characterized in that... The additional refractive power of the microlens (11) is +2.5D to +5.0D.

7. The lens with a hybrid microstructure design combining defocusing and dot diffusion functions according to claim 1, characterized in that... The lenses are integrally molded from CR-39, polycarbonate, or MR series high refractive index materials.

8. A pair of eyeglasses, characterized in that: It includes a frame and a lens with a hybrid microstructure design that combines defocus and dot diffusion functions as described in any one of claims 1-7.

Images