Myopia control spectacle lens structure with variable imaging contrast and eyeglasses using the same
By attaching a variable imaging contrast signal film to the surface of the refractive lens, the imaging contrast of the retina is reduced, which solves the problems of optic nerve adaptation and high cost of frequent replacement of myopia control lenses, and achieves a flexible myopia control effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DEGA SMART PHOTOELECTRIC TECH (ZHENJIANG) CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-07-31
AI Technical Summary
Existing myopia control lenses are difficult to effectively slow down the progression of myopia due to optic nerve adaptation problems caused by retinal adaptation and the increased difficulty and cost of fitting caused by frequent replacements.
The myopia control lens structure with variable imaging contrast reduces retinal imaging contrast by 30% to 60% by attaching a replaceable contrast signal film to the surface of the refractive lens body. It also uses point diffusion technology to form a scattering or diffraction structure in the peripheral area, thereby achieving flexible contrast adjustment.
It effectively inhibits or delays the progression of myopia, reduces economic costs, decreases the frequency of lens replacement, maintains continuous prevention and control effects, and adapts to the needs of different stages of myopia management.
Smart Images
Figure CN224581775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a myopia control lens structure with variable imaging contrast and eyeglasses using the lens. Background Technology
[0002] In recent years, myopia has become a significant health issue affecting children and adolescents. Preventing the onset of myopia and slowing its progression are key to managing this problem. Currently, wearing orthokeratology (Ortho-k) lenses or specially designed eyeglasses with convenient operation and fewer side effects has become a commercialized solution for clinical myopia control.
[0003] In 2023, the Optometry Group of the Ophthalmology Branch of the Chinese Medical Association and the Optometry Professional Committee of the Ophthalmology Branch of the Chinese Medical Doctor Association jointly released the "Expert Consensus on the Application of Myopia Control-Related Framed Glasses in Myopia Management (2023)". This consensus introduces four optical mechanisms and principles related to myopia control-related framed glasses: accommodation mechanism, peripheral defocus mechanism, higher-order aberration theory, and contrast theory. The peripheral defocus mechanism, higher-order aberration theory, and contrast theory each have their applications in specially designed framed glasses. Contrast theory suggests that high retinal imaging contrast promotes eyeball growth, increasing the risk and degree of myopia. Therefore, reducing the contrast of the image within the retina will slow axial elongation, thereby inhibiting myopia progression. Based on contrast theory, a lens based on Diffusion Optics Technology (DOT) has been developed. DOT technology is used to form a scattering and diffraction structure in the peripheral area other than the central light-transmitting area. When light passes through the peripheral area, it is scattered or diffracted, thereby generating a low signal difference between adjacent cones while maintaining excellent visual acuity and functional peripheral vision.
[0004] Because the human retina is mainly composed of photoreceptor cells (rod cells and cone cells), it can convert light signals into electrical signals. These light signals undergo a series of signal transmissions and processing within the retina to ultimately form visual information. This visual information is transmitted to the brain via the optic nerve, and after being analyzed by the visual cortex, it forms the image we see. This characteristic of the retina means that the static, constant optical interference signal output by a fixed lens shape will inevitably induce optic nerve adaptation. The time required varies from person to person and is difficult to align with changes in the user's single-vision lens refractive power. However, frequent replacement of myopia control lenses increases the difficulty and cost of fitting, hindering the successful implementation of myopia control. Summary of the Invention
[0005] The technical problem to be solved by this utility model is to provide a myopia control lens structure with variable imaging contrast and eyeglasses using the lens.
[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0007] A myopia control lens structure with variable imaging contrast includes: a refractive lens body and a replaceable contrast signal film attached to all or a predetermined portion of the surface of the refractive lens body, wherein the light signal passing through the contrast signal film has a 30% to 60% lower contrast compared to the light signal passing through the refractive lens body alone.
[0008] Preferably, the contrast signal film is attached to the surface of the diopter lens body by bonding; or, the contrast signal film is attached to the surface of the diopter lens body by electrostatic adsorption.
[0009] Preferably, the contrast signal film comprises a randomly scattered dot matrix.
[0010] Alternatively, the contrast signal film may include a microstructure with a predetermined pattern; in one specific embodiment, the microstructure with the predetermined pattern is formed on the film substrate by transfer printing.
[0011] The refractive lens of this utility model embodiment has a spherical, aspherical, or freeform surface to achieve the function of normally correcting the user's refractive error according to the user's current vision.
[0012] According to an embodiment, the contrast signal film includes a central optical region with high light transmittance and a contrast-reducing region surrounding the central optical region. The central optical region is aligned with the diopter lens body when the contrast signal film is attached, and the area of the contrast-reducing region surrounding the central optical region is several times larger than that of the central optical region, thereby creating a predetermined contrast-reduction effect.
[0013] Preferably, the central optical region is formed into a regular region shape that satisfies axis symmetry, such as a circle or hexagon.
[0014] Alternatively, the central optical region can be formed as a regular region that satisfies bilateral symmetry, such as a shell or an oval.
[0015] On the other hand, embodiments of this application also provide eyeglasses, including a frame and any of the aforementioned variable imaging contrast myopia control lens structures placed within the frame.
[0016] The beneficial technical effects of the technical solutions provided by the embodiments of this application include: by attaching a replaceable contrast signal film to the outside of the refractive lens, a specific contrast reduction scheme can be determined according to the user's current individual situation. When light passes through the lens structure and enters the user's eye, a lower signal difference is generated between adjacent cones of the retina. That is, by reducing the contrast of the peripheral imaging of the retina, the development of myopia can be better suppressed or delayed. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a myopia control lens structure with variable imaging contrast provided by this utility model;
[0018] Figure 2 This is a schematic diagram of the diffused contrast signal film at the midpoint of the lens structure according to an embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of the contrast signal film having a predetermined pattern in the lens structure of this utility model embodiment. Detailed Implementation
[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0021] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the present invention according to the specific circumstances.
[0023] Furthermore, the terms “first” and “second” as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. When used herein, the singular forms “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having” specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof.
[0024] Overcorrection and undercorrection are terms used in eyeglass optics to describe the degree to which eyeglasses correct vision: overcorrection means that the lenses provide more correction than actually needed, while undercorrection means that the lenses provide insufficient correction. Therefore, the normal correction described in this application refers to the absence of overcorrection or undercorrection in the refractive power of the lens, and consistency with the refractive power indicated by the user's prescription.
[0025] like Figure 1 As shown, the variable imaging contrast myopia control lens structure of this utility model includes a diopter lens body 1 and a replaceable contrast signal film 2 attached to a portion of the surface of the body 1.
[0026] Currently, the refractive lens body 1 on the market is usually a 70mm circular lens, formed from various suitable plastic / resin materials. Exemplary materials may include acrylic (CR-39R), polycarbonate (PC), cellulose acetate (CAZ), polyamide (PA or optical nylon) or other plastic / resin materials. This invention does not limit the material and surface morphology of the refractive lens body 1. The lens body 1 has a spherical, aspherical or freeform surface to be customized according to the user's current vision and prescription, so as to achieve the effect of normal correction of the user's refractive error.
[0027] In a specific implementation, the contrast signal film 2 can be attached to the surface of the refractive lens body 1 by bonding or by electrostatic adsorption. Since human vision is not symmetrical, the visual field of a single eye is generally about 55° upward, about 70° downward, about 65° towards the nose, and about 100° towards the ear. The contrast signal film does not need to be attached to the entire surface of the body 1 in a completely symmetrical manner. However, the present invention does not limit the contrast signal film 2 to a structure that completely covers the refractive lens body 1.
[0028] In an embodiment of the present invention, a typical contrast signal film is a dot-diffuse film, such as... Figure 2As shown, a protective layer 21 and a dot diffusion layer 22 are distributed sequentially from top to bottom. The protective layer 21 includes a hardening layer, an anti-reflective coating layer, a hydrophobic coating layer, an anti-fog coating layer, and a wear-resistant layer. The protective layer 21 has uniform high light transmittance and does not have a dot diffusion effect, and is used to protect the dot diffusion layer 22. During daily wear and cleaning, the presence of the protective layer 21 will not cause wear and damage to the dot diffusion area in the dot diffusion layer. The thickness of the dot diffusion layer 22 is 0.1 to 1 mm. The refractive index of the dot diffusion layer 22 is different from that of the protective layer 21 and the refractive lens body 1. The refractive index of the dot diffusion layer 22 can be larger or smaller than that of the protective layer 21. The refractive index of the dot diffusion layer 22 can also be larger or smaller than that of the material used to make the refractive lens body 1, as long as the protective layer 21, the dot diffusion layer 22, and the refractive lens body 1 are not made of the same material. This can prevent the scatterers on the dot diffusion layer 22 from losing their function.
[0029] In one specific embodiment, the dot diffusion layer 22 is made of one or more optical materials selected from polycarbonate, nylon, cellulose triacetate, polyvinyl alcohol, cellulose acetate butyrate, polycarbonate, polymethyl methacrylate, polystyrene, etc., which are different from the material of the lens body 1. The dot diffusion layer does not undergo dot diffusion treatment in the central optical region, but maintains a uniform thickness and a transmittance of over 95%, thereby giving the contrast signal film 2 a central optical region with high transmittance. This central optical region can be aligned with the diopter lens body according to lens standards when the signal film is attached to the diopter lens. Preferably, the central optical region is formed as a regular region shape that satisfies axial symmetry, such as a circle or hexagon; alternatively, the central optical region is formed as a regular region that satisfies bilateral symmetry, such as a shell or ellipse; the effective horizontal radial dimension of the central optical region is not less than 4 mm, and the effective vertical dimension is not less than 2 mm.
[0030] The non-central optical region of the dot diffusion layer 22 typically presents a contrast reduction region distributed around the central optical region. Its area should be several times larger than that of the central optical region to form a predetermined contrast reduction effect, such that the light signal passing through the contrast signal film is reduced in contrast by 30% to 60% compared to the light signal passing only through the diopter lens body, for example, a reduction of 33% to 45% in contrast.
[0031] Diffusion points or patterns are formed by treating the point diffusion layer. For example, random dot matrix is created by coating or penetrating randomly scattered particles into a predetermined area on the film surface, and the degree of contrast reduction is controlled by adjusting the number of particles. For this process, methods suitable for the film material, such as spin coating, spray coating, or thermal evaporation, can be used to distribute microparticles in the film layer. In spin coating, a solution containing microparticles is spin-coated onto the substrate, and centrifugal force is used to evaporate the solvent, while the particles are randomly distributed in the film layer. In spray coating, a solution or suspension containing microparticles is sprayed onto the substrate through a sprayer, and the microparticles are randomly deposited to form a film. In thermal evaporation, the material containing microparticles is heated and evaporated, and the particles are randomly deposited on the cold substrate surface to form the film layer.
[0032] However, this is not the only option; alternatively, the contrast signal film can also be formed into a microstructure with a predetermined pattern, and formed on the film substrate in a stamp transfer manner, such as... Figure 3 As shown, this implementation process requires the film layer to have a thickness slightly greater than that of the particle diffusion process described above.
[0033] The microstructure of the predetermined pattern can be formed as follows Figure 3 The various pattern types shown are preferably distributed more densely in the lower and ear-side areas of the field of vision, and relatively sparsely in the upper and nose-side areas, thereby achieving the effect of reducing contrast in sheet-like areas.
[0034] Compared to directly integrated variable imaging contrast lenses, the lens structure proposed in this invention achieves variable imaging contrast through an attached film. This leverages the relatively long lifespan and rigidity of the lens itself, increasing the flexibility and replaceability of contrast reduction. The replaceable contrast signal film can be a consumable product, its implementation determined by the progress of myopia management programs. Different programs can be implemented at different stages of rapid myopia development in adolescents. When users no longer require changes in refractive lenses, simply replacing the contrast signal film maintains and consolidates the control effect without needing to replace the refractive lenses. This solves the problems of custom-made myopia control glasses, long delivery cycles, and high costs associated with frequent replacements, reducing users' economic costs, saving resources, and achieving a sustained effect of slowing myopia progression.
[0035] The above provides a detailed description of the variable imaging contrast myopia control lens structure and the eyeglasses using the lens provided by this utility model. Any obvious modifications made by those skilled in the art without departing from the essential content of this utility model will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liability.
Claims
1. A myopia control spectacle lens structure with variable imaging contrast, characterized in that include: The refractive lens body and a replaceable contrast signal film attached to all or a predetermined portion of the surface of the refractive lens body, wherein the light signal passing through the contrast signal film has a 30% to 60% lower contrast compared to the light signal passing through the refractive lens body alone.
2. The myopia control lens structure of claim 1, wherein The contrast signal film is attached to the surface of the diopter lens body by bonding, or by electrostatic adsorption.
3. The myopia control lens structure of claim 2, wherein The refractive lens body has a spherical, aspherical, or freeform surface to achieve the effect of normally correcting the user's refractive error according to the surface difference requirements of the user's current refractive correction.
4. The myopia control lens structure of claim 2 or 3, wherein The contrast signal film includes a central optical region and a contrast reduction region outside the central optical region. The central optical region is aligned with the diopter lens body when the contrast signal film is attached to the diopter lens body, and the film layer maintains a consistent thickness and a light transmittance of over 95%. The non-central optical region is the area of reduced contrast surrounding the central optical region, and its area is several times that of the central optical region.
5. The myopia control lens structure of claim 4, wherein The contrast signal film includes a microstructure with a predetermined pattern; or, the contrast signal film includes a randomly scattered dot matrix.
6. The myopia control lens structure of claim 5, wherein The microstructure of the predetermined pattern is formed on the film substrate by transfer printing.
7. The myopia control lens structure of claim 5, wherein A random scattering lattice is formed by coating or penetrating randomly scattered particles onto a predetermined area of the membrane surface.
8. The myopia control lens structure of claim 6 or 7, wherein The effective horizontal dimension of the central optical area is not less than 4mm, and the effective vertical dimension is not less than 2mm.
9. The myopia control lens structure of claim 8, wherein The central optical region is formed into a regular region shape that satisfies axial symmetry; or, it is formed into a regular region that satisfies left-right symmetry.
10. Eyeglasses, characterized in that Includes a frame and a myopia control lens structure as described in any one of claims 1 to 9, placed within the frame.