CN221378420U

CN221378420U - Far vision lens

Info

Publication number: CN221378420U
Application number: CN202323035613.2U
Authority: CN
Inventors: 乔镇涛; 岳鹏程; 张彤; 孔玲; 董霞; 刘保日
Original assignee: Blue Eye Medical Technology Qingdao Co ltd
Current assignee: Blue Eye Medical Technology Qingdao Co ltd
Priority date: 2023-11-10
Filing date: 2023-11-10
Publication date: 2024-07-19
Anticipated expiration: 2033-11-10

Abstract

The utility model discloses a far-vision lens, which comprises a lens body, wherein the lens body is provided with a central area and a plurality of concentric circular ring structures which encircle the outer periphery of the central area, the circular ring structures are positioned on the surface of the lens body far away from eyes of a human body, the diameter of each circular ring structure gradually increases along the direction far away from the central area, each circular ring structure consists of a plurality of micro lenses with negative degrees, two adjacent micro lenses are closely arranged, the myopia degree of the micro lenses corresponding to each circular ring structure gradually increases along the direction far away from the central area, the speed of reducing the height far-vision degree can be accelerated, and the vision recovery and the positive visualization of a high far-vision patient are facilitated.

Description

Far vision lens

Technical Field

The utility model relates to the field of lens manufacturing, in particular to a far-vision lens.

Background

In recent years, high hyperopia has caused serious damage to teenagers' vision and has caused inconvenience to their lives. In order to meet the demands of people for controlling or reducing the degree of hyperopia, high hyperopia may cause problems such as vision deterioration, eye discomfort and learning difficulty, so hyperopia control is an important subject in ophthalmic research. High hyperopia is not only related to low vision, but also easily causes amblyopia, accommodation internal strabismus, binocular vision dysfunction and the like. Studies have shown that the diopter annual reduction is greater in high-vision children than in low-vision children. In terms of daily clinical experience, the more advanced hyperopic patients, the slower their hyperopic progression, affecting the trend toward normal recovery of diopters. The daily wearing of the high-altitude far-vision lens firstly affects the appearance, and secondly can not effectively reduce the speed of far-vision recovery.

For example, chinese patent application CN115032816 discloses a compound multifocal and full-focal lens for retarding the progression of hyperopia, wherein the first surface and the second surface of the lens are superimposed front and back to form a convex lens with compound multifocal and full-focal, and the differential design is used to induce eye axis elongation, delay the increase of hyperopia of eyes, and is suitable for any hyperopia patient, especially for teenager hyperopia patient with better effect.

Disclosure of utility model

The utility model aims to provide a far-vision lens which solves the problems in the prior art, can accelerate the reduction speed of the high far-vision power and is beneficial to the vision recovery and the orthovision of a high far-vision patient.

In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a peripheral myopia defocusing lens, which comprises a lens body, wherein a central area and a plurality of concentric circular ring structures surrounding the outer periphery of the central area are arranged on the lens body, the circular ring structures are positioned on the surface of the lens body far away from eyes of a human body, the diameter of each circular ring structure gradually increases along the direction far away from the central area, the circular ring structures are composed of a plurality of micro lenses with negative degrees, two adjacent micro lenses are closely arranged, and the myopia degree of each micro lens corresponding to each circular ring structure gradually increases along the direction far away from the central area.

Preferably, the vertical intervals between two adjacent circular ring structures are equal.

Preferably, the vertical interval between two adjacent circular ring structures is 2mm to 3mm.

Preferably, the change range of the myopia degree corresponding to the micro lenses from the innermost side to the outermost side is-1.00D to-4.00D.

Preferably, the difference of the powers of the microlenses corresponding to the two adjacent annular structures is 0.20D to 0.30D.

Preferably, the range of the degree of the micro-lens corresponding to the micro-lens from the innermost side to the outermost side is-1.50D to-3.75D, and the degree difference of the micro-lenses corresponding to the adjacent two circular ring structures is 0.25D.

Preferably, the lens body comprises a substrate and a film layer attached to the substrate far away from eyes of a human body, and the circular ring structure is arranged on the film layer.

Preferably, the central region is a circular structure with a diameter of 10mm, and the innermost circular ring structure surrounds the outer peripheral side of the central region and is spaced from the central region by 2mm to 3mm.

Preferably, the distance between two adjacent microlenses on the same annular structure is 0.5mm.

Preferably, the surface of the substrate is in the shape of an aspherical curve, and the shape function of the aspherical curve is as follows:

I(θ)＝I0*(σ/(4π))*(1/(sin(θ/2))⁴)*F(θ)；

where I (θ) is the intensity of scattered light, I0 is the intensity of incident light, σ is the standard deviation of surface roughness, θ is the scattering angle, and F (θ) is the shape function.

Compared with the prior art, the utility model has the following technical effects:

The annular structures on the whole lens body are designed in concentric circles, and the myopia degree of the micro lenses on the annular structures is gradually changed, so that the hyperopia degree can be controlled, the development trend of hyperopia is effectively reduced, and the problem of harm of high hyperopia to teenager vision is solved. Compared with the traditional glasses lens, the lens not only can play a role in controlling hyperopia, but also can reduce peripheral distortion caused by punctiform defocus, and provides better visual effect.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of the overall structure of the present utility model;

FIG. 2 is a side view of the overall structure of the present utility model;

FIG. 3 is a schematic diagram of a generic lens imaging;

FIG. 4 is a schematic view of a lens imaging system according to the present utility model

Wherein, 1-lens body, 2-ring structure, 3-microlens, 4-central region, 5-substrate, 6-membranous layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1 to 4, the present embodiment provides a far-vision lens, including a lens body 1, a central area 4 is provided on the lens body 1, a plurality of concentric ring structures 2 surrounding the peripheral side of the central area 4 are provided on the lens body 1, the ring structures 2 are located on the surface of the lens body 1 far away from the eyes of the human body, the diameter of each ring structure 2 gradually increases along the direction far away from the central area 4, the ring structure 2 is composed of a plurality of micro lenses 3 with negative power, preferably, the distance between two adjacent micro lenses 3 on the same ring structure 2 is 0.5mm, the adjacent micro lenses 3 are closely arranged, the near-vision power corresponding to each ring structure 2 gradually increases along the direction far away from the central area 4, each ring structure 2 on the whole lens body 1 adopts concentric circle design, and the near-vision power of each micro lens 3 on each ring structure 2 gradually changes, so as to control the far-vision power, effectively reduce the development trend of far-vision, and solve the problem of the harm of high far-vision to teenagers. Compared with the traditional glasses lens, the lens not only can play a role in controlling hyperopia, but also can reduce peripheral distortion caused by punctiform defocus, and provides better visual effect. The specific requirements are as follows: myopia and hyperopia are both caused by problems with refractive power of the eye. Normally, the eye can focus light on the retina so that a clear image is seen. However, if the eyeball is too long or the cornea curvature is too curved, light rays are converged in front of the retina to form a blurred image, namely myopia; conversely, if the eyeball is too short or the curvature of the cornea is not sufficiently curved, light rays are concentrated behind the retina, resulting in an invisible distant object, which is hyperopia. Peripheral imaging presentation in front of the retina, relative to the center of the eye, can become myopic defocus, which helps retard the growth of the eye's axis, thereby slowing the rate of reduction in distance vision. On the basis of the principle that the peripheral far vision defocus disclosed by the utility model can make peripheral imaging behind retina after wearing, so as to stimulate the growth of the eye axis, thereby accelerating the reduction of the far vision degree and helping the patient to recover normal vision more quickly.

As a preferred embodiment of the present utility model, the degree of change of the far vision is controlled by creating concentric ring structures 2 on the lens body 1 and adjusting the number of ring structures 2 and the vertical interval between the ring structures 2, preferably the vertical interval between two adjacent ring structures 2 is equal to ensure that the power of the micro lens 3 can be uniformly and progressively changed. Wherein, in order to ensure visual quality and comfort, the vertical interval between two adjacent annular structures 2 is 2mm to 3mm, and the variation range of myopia degree corresponding to the micro lens 3 from the innermost side to the outermost side is-1.00D to-4.00D. As a preferred embodiment, the power difference of the microlenses 3 corresponding to the adjacent two annular structures 2 is 0.20D to 0.30D, the variation range of the myopic power corresponding to the innermost microlens 3 to the outermost microlens 3 is-1.50D to-3.75D, and the power difference of the microlenses 3 corresponding to the adjacent two annular structures 2 is 0.25D.

Further, the lens body 1 includes a substrate 5 and a film layer 6 attached to the substrate 5 far away from eyes of a human body, the annular structure 2 is disposed on the film layer 6, and the film layer 6 of the lens is specifically designed according to specific requirements and functional requirements, such as anti-reflection, anti-scratch, and the like, and meanwhile, suitable materials, such as optical glass or plastic, are selected to ensure optical performance and durability, so that the substrate 5 structure of the lens is prevented from being influenced by the provision of the micro lens 3 under the premise of ensuring concentric annular structure 2 and progressive variation of myopia degree, and further, the curvature and surface quality of the lens are prevented from being influenced.

Of these, the central region is preferably a circular structure having a diameter of 10mm, the area of which is determined as required, and the innermost annular structure 2 surrounds the outer peripheral side of the central region with a spacing of 2mm to 3mm from the central region.

The surface of the substrate 5 is in the shape of an aspherical curve, and the shape function of the aspherical curve is as follows:

I(θ)＝I0*(σ/(4π))*(1/(sin(θ/2))⁴)*F(θ)；

where I (θ) is the intensity of scattered light, I0 is the intensity of incident light, σ is the standard deviation of surface roughness, θ is the scattering angle, and F (θ) is the shape function. The formula comprehensively considers the influence of the surface roughness and the shape function on scattered light, describes the aspherical curve shape of the lens surface and also considers the scattering phenomenon on the rough surface. By applying the shape function of the aspherical curve to the spectacle lens design, control and optimization of the distance vision power can be achieved, providing a better visual effect. Adjustment and optimization are required according to specific design requirements and characteristics of the optical system to ensure that the performance and effect of the lens meet expectations. In the design of a defocused lens, the application of the above formula to the evaluation and optimization of surface roughness and shape function can have the following effects:

First, the effect of surface roughness on scattered light was evaluated: the (σ/(4pi)) portion in the formula represents the contribution of the standard deviation of the surface roughness to the scattered light intensity. The degree of influence of the surface roughness on the scattered light can be evaluated by calculating and analyzing the standard deviation of the surface roughness. This helps to determine the acceptable range of surface roughness and provides a reference for quality control during lens manufacturing.

Second, optimizing the effect of the shape function on scattered light: the F (θ) portion of the formula represents the adjustment of the scattered light intensity by the shape function. By selecting and optimizing the shape function, the intensity of scattered light can be reduced, thereby improving the optical performance of the lens. Optimization of the shape function can be performed according to specific defocus lens design requirements and optical system characteristics, so as to achieve better optical focusing control and reduce defocus.

Third, influence of scattering angle: the (1/(sin (θ/2)) ⁴ portion of the formula represents the effect of the scattering angle on the scattered light intensity. In the out-of-focus lens design, control of the scattering angle is critical to reducing scattered light intensity and improving imaging quality. By optimizing the shape and curvature of the lens, the scattering angle can be adjusted, thereby reducing the effect of scattered light.

Further, the ellipsoidal curve is designed to improve the visual quality by controlling the shape of the lens. The design can reduce the distortion of the lens and improve the definition and stability of the image. First, the design of the aspherical curve may reduce spherical aberration. Spherical aberration is the inaccurate focusing of light due to the irregular shape of the lens surface, thereby affecting visual quality. By using an ellipsoidal curve, the surface of the lens can be more regular, and the spherical aberration can be reduced, so that the visual quality can be improved. Second, the design of the aspherical curve may reduce chromatic aberration. Chromatic aberration refers to the phenomenon that when light rays with different colors are refracted through lenses, the colors are inconsistent due to different refractive indexes. By using an ellipsoidal curve, the refractive index distribution on the surface of the lens can be more uniform, and the chromatic aberration is reduced, so that the visual quality is improved. Finally, the design of the aspherical curve may reduce distortion. Distortion is a phenomenon in which light rays are refracted by a lens, and then the formed image deviates from the original image. By using the ellipsoidal curve, the curvature of the surface of the lens can be more in line with the vision requirement of human eyes, and the distortion is reduced, so that the vision quality is improved. In general, the design of an ellipsoidal curve improves visual quality by improving the shape of the lens, reducing spherical aberration, chromatic aberration, and distortion.

Further, the lens manufacturing process for the aspherical curve design is as follows:

Design curve: the shape function of the aspherical curve is created using CAD software or other specialized design software. The proper curve shape is designed according to the required hyperopia degree and the optimization requirement. Such software can assist the designer in drawing and adjusting the aspherical curve to meet the requirements of a particular distance vision power.

Manufacturing a lens substrate: depending on the designed curve shape, a suitable material is selected, such as optical glass or plastic. Cutting and polishing the original material by numerical control processing equipment such as a numerical control lathe, a numerical control grinding machine or a numerical control milling machine and the like to obtain a lens matrix with preliminary shape and precision.

And (3) heat treatment: the lens matrix is heat treated as necessary to improve its shape and performance. The heat treatment may be carried out by heating and cooling the lens matrix to adjust its shape and surface characteristics at a specific temperature.

Determining the position of a curved surface: the curvature and surface quality of the lens are determined using optical test instruments, such as curvature gauges, optical projectors, and the like.

Polishing and polishing: the lens surface is further processed and polished as necessary using polishing and buffing equipment to ensure its optical quality and surface accuracy.

And (3) coating treatment: special optical coatings are applied to the lens surface as needed to increase its reflectivity, anti-glare or anti-reflection functions.

The lens manufacturing process of aspherical curve design involves multiple steps of design, cutting, polishing, heat treatment, coating and quality control to ensure that the shape, optical properties and quality of the lens meet expectations. These steps are typically accomplished using CAD software, numerically controlled machining equipment, heat treatment equipment, and optical test equipment and tools.

The adaptation to the actual need is within the scope of the utility model.

It should be noted that it will be apparent to those skilled in the art that the present utility model is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. The utility model provides a far-sighted lens, its characterized in that includes the lens body, be equipped with central region, a plurality of concentric and encircle on the lens body the ring structure of central region periphery side, ring structure is located the lens body is kept away from on the surface of human eye, each ring structure's diameter is along keeping away from the direction grow gradually in central region, ring structure comprises the microlens of a plurality of negative degrees, adjacent two the microlens press close to the setting, with each ring structure corresponds the myopia degree of microlens is along keeping away from the direction in central region increases gradually.

2. The presbyopic lens of claim 1, wherein the vertical spacing between adjacent ones of the annular structures is equal.

3. The presbyopic lens of claim 2, wherein a vertical separation between adjacent ones of the annular structures is from 2mm to 3mm.

4. A presbyopic lens as claimed in claim 2 or 3, wherein said inner-most to outer-most microlenses correspond to a myopic degree variation in the range of-1.00D to-4.00D.

5. The presbyopic lens of claim 4, wherein the power difference between the microlenses corresponding to adjacent ones of the annular structures is from 0.20D to 0.30D.

6. The hyperopic lens of claim 5 wherein the micro-lenses at the innermost side to the outermost side have a varying range of-1.50D to-3.75D of myopic power, and the micro-lenses at adjacent two of the annular structures have a power difference of 0.25D.

7. The presbyopic lens of claim 6, wherein said lens body comprises a substrate and a membrane layer attached to said substrate away from the eyes of the human body, said annular ring structure being disposed on said membrane layer.

8. The presbyopic lens of claim 7, wherein the central region is a circular structure having a diameter of 10mm, and the innermost annular structure surrounds the peripheral side of the central region and is spaced from the central region by a distance of 2mm to 3mm.

9. The presbyopic lens of claim 8, wherein a distance between two adjacent microlenses on the same annular structure is 0.5mm.

10. The presbyopic lens of claim 9, wherein the substrate surface is in the shape of an aspherical curve, and wherein the shape function of the aspherical curve is:

I(θ)＝I0*(σ/(4π))*(1/(sin(θ/2))⁴)*F(θ)；