Lenses that slow down axial elongation based on prism diffusion technology

Abstract

Lenses based on prism dot diffusion technology to slow axial elongation belong to the field of ophthalmic optical instruments and are used to inhibit axial elongation in myopic patients. They include dual functional areas of prism lenses and dot diffusion spots. The prism lens consists of 1-5 prisms from the base inwards and +1.00D to +3.00D lens units. The functional area is composed of a nano-imprinted dot diffusion array with a dot diffusion diameter of 0.1mm. When working at close range using the prism lens, it is equivalent to telephoto vision of approximately 3 meters, reducing excessive stimulation of the axial length caused by accommodation and eye strain. Simultaneously, the dot diffusion (discrete spot control technology) unit reduces contrast, creating a dynamic spot diffusion effect. This dual effect, combined with the prism lens, provides better inhibition of axial elongation compared to traditional prism lenses.

Description

Technical Field

[0001] This utility model relates to a lens that slows down axial elongation based on prism diffusion technology, and belongs to the field of ophthalmic optical instruments. Background Technology

[0002] With the continuous rise in the incidence of myopia among teenagers, optical intervention has become a core means of slowing the progression of myopia. However, current mainstream technologies have the following drawbacks:

[0003] 1. Traditional monofocal lenses: These only correct refractive errors and cannot solve the problem of accommodative lag when reading at close range. When focusing on a near object at 33cm, the eye needs to generate 3.00D of accommodative force, and long-term stress leads to excessive elongation of the axial length.

[0004] 2. Prism-attached lenses: Although they reduce convergence requirements by using a base-inward prism, they lack a defocus signal modulation module and cannot suppress peripheral hyperopic defocus of the retina. Clinical data show that their axial length control efficiency is less than 40%.

[0005] 3. Dot-diffusion defocus lenses: These lenses create a defocus signal by uniformly distributed microlenses on the lens surface. However, high-density microlenses cause glare and decreased visual acuity, and they do not adapt to the downward pupillary movement characteristic when viewing near objects, resulting in a defocus spot utilization rate of less than 50%.

[0006] Therefore, there is an urgent need to develop a lens based on prism diffusion technology to slow down axial elongation, thereby inhibiting axial elongation while ensuring visual comfort. Utility Model Content

[0007] The purpose of this invention is to address the problems of existing myopia control lenses, such as their simple structure, limited effectiveness, or visual interference. This invention provides a structurally innovative composite optical lens. Through a specific structural design, this lens effectively combines two different optical functional structures, aiming to simultaneously improve near-vision eye strain and peripheral optical signals, achieving superior myopia control while inhibiting axial elongation and ensuring visual comfort. A brief overview of this invention is provided below to offer a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0008] The technical solution of this utility model:

[0009] Lenses that slow axial elongation based on prism diffusion technology include a prism layer and a diffusion structure layer. The diffusion structure layer is processed on the surface of the prism layer. The functional area of ​​the prism layer is composed of 1-5 prism powers and +1.00D to +3.00D lens units from the base inward. The diffusion structure layer is distributed with a diffusion array formed by nanoimprinting. The diameter of a single diffusion unit in the diffusion array is 0.1mm.

[0010] Preferably, the radius of curvature error of the interface between the functional area of ​​the prism layer and its substrate is ≤ ±0.05mm.

[0011] Preferably, the density of the dot diffusion array is 50-200 dots / mm².

[0012] Preferably, the optical micro-units of the point diffusion structure layer are one of convex, concave, or Fresnel types.

[0013] Preferably, the functional area of ​​the prism layer coincides with the geometric center of the dot diffusion array, with an offset error ≤ ±0.5mm.

[0014] Preferably, the surface of the dot diffusion array is covered with an anti-reflection coating layer with a thickness of 80-150 nm.

[0015] Preferably, the prism layer has an anti-reflective layer on the side away from the eyeball.

[0016] Preferably, the distribution density of the point diffusion array decreases gradually from the center to the edge, with a density change rate of 5-15 points / mm² per millimeter.

[0017] This utility model has the following beneficial effects:

[0018] 1. The prism-permeable layer and dot-diffusion structure layer of this utility model can simultaneously address two important visual factors related to myopia development: near-field accommodation burden and peripheral optical signals. It is expected to produce a better synergistic prevention and control effect than a single technology, effectively slowing down the growth of the axial length of the eye.

[0019] 2. This utility model, through the rational design of the distribution of the dot diffusion structure, can effectively ensure the clarity of the wearer's central vision and solve the glare problem of uniform defocus lenses;

[0020] 3. The dot diffusion structure of this utility model is tightly integrated with the prism-transparent layer, resulting in a stable structure and reliable optical performance. The prism-transparent layer composite structure makes near vision at 33cm equivalent to 3m distance vision, reducing the accommodation requirement from 3.00D to 0.33D and significantly reducing ciliary muscle tension.

[0021] 4. This utility model can be applied to various lens types such as single vision, bifocal, and progressive multifocal lenses, making it easy for wearers to adapt. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a lens structure that slows down axial elongation based on prism diffusion technology;

[0023] Figure 2 This is a cross-sectional view of the prism layer.

[0024] In the diagram: 1 - prism layer, 2 - point diffusion structure layer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0026] Lenses based on prism diffusion technology are used to slow down axial elongation and can be used in conjunction with eyeglass frames.

[0027] Specific implementation method one: Combining Figure 1-2 This embodiment describes a lens for delaying axial elongation based on prism diffusion technology. It includes a prism layer 1 and a diffusion structure layer 2. The diffusion structure layer 2 is fabricated on the surface of the prism layer 1. The prism consists of 1-5 prisms from the base inwards and +1.00D to +3.00D lens units. Preferably, the functional area of ​​the prism layer 1 in this embodiment is composed of 2 prisms from the base inwards and a +1.50D lens unit, located in the optical center area. The curvature radius error of the bonding surface is controlled to ±0.03mm, meeting the requirement of ≤±0.05mm.

[0028] The dot diffusion structure layer 2 is processed on the surface of the translucent layer 1 using nanoimprint technology to form a dot diffusion array with a diameter of 0.1 mm. The array density is 180 dots / mm² in the central area, 60 dots / mm² in the edge area, and an overall density range of 50-200 dots / mm². The density gradient change rate is 10 dots / mm² per millimeter, which meets the requirement of 5-15 dots / mm² per millimeter.

[0029] The optical micro-units of the point diffusion structure layer 2 are convex microlenses, which can be one of the following: convex, concave, or Fresnel type.

[0030] The functional area of ​​the prism layer 1 coincides with the geometric center of the dot diffusion array, and the measured offset error is ≤ ±0.5mm.

[0031] The surface of the dot-diffusion array is covered with an anti-reflection coating layer with a thickness in the range of 80-150nm.

[0032] The anti-reflective layer 3 is a thick magnesium fluoride coating.

[0033] Because the surface of existing dot diffusion lenses is easily scratched, leading to dot diffusion failure, the outer surface of the anti-reflective layer is also provided with an anti-scratch layer. The anti-scratch layer is a silica nanoparticle reinforced resin layer. A thickness of less than 50μm is insufficient for protection, and a thickness of more than 100μm affects light transmittance. Therefore, the thickness is set to 50-100μm, with a Mohs hardness of ≥6. Specific materials + thickness / hardness quantification improve the durability of the lens.

[0034] The above embodiments are merely preferred embodiments of this utility model, used to illustrate the technical concept and structural features of this utility model, and not to limit it. Any modifications, equivalent substitutions, or partial adjustments made within the principles of the structural features of this utility model (e.g., changing the specific area covered by the prism layer; adjusting the prism power value or gradient method; selecting different types of point diffusion structures such as microprisms; changing the specific size, shape, depth / height, or distribution density and arrangement of the micro-units; setting the point diffusion structure at different depths of the prism layer, etc.) should be included within the protection scope of the claims of this utility model. The lens can be manufactured using known optical lens manufacturing processes such as molding, injection molding, turning, and laser processing.

Claims

1. A lens for delaying axial elongation based on prismatic diffusing technology, characterized in that: It includes a prism layer (1) and a dot diffusion structure layer (2). The dot diffusion structure layer (2) is processed on the surface of the prism layer (1). The functional area of ​​the prism layer (1) is composed of 1-5 prism powers from the substrate inward and lens units of +1.00D to +3.00D. The dot diffusion structure layer (2) is distributed with a dot diffusion array formed by nanoimprinting, and the diameter of a single dot diffusion unit in the dot diffusion array is 0.1 mm.

2. The lens for retarding axial elongation based on prismatic and diffractive point spread technology according to claim 1, wherein: The radius of curvature error of the interface between the functional area of ​​the prism layer (1) and its substrate is ≤ ±0.05mm.

3. The lens for retarding axial elongation based on prismatic and diffractive point expansion technology according to claim 1, characterized in that: The density of the point diffusion array is 50-200 per mm².

4. The retinal based point diffusion technology based lens for slowing axial elongation according to claim 1 or 3, wherein: The optical micro-units of the point diffusion structure layer (2) are one of convex, concave or Fresnel type.

5. The retinal based, prismatic, point expansion technology based lens for slowing axial elongation according to claim 4, wherein: The functional area of ​​the prism layer (1) coincides with the geometric center of the dot diffusion array, with an offset error ≤ ±0.5mm.

6. The retinal based, prismatic, point expansion technology lens for slowing axial elongation according to claim 1, wherein: The surface of the dot diffuser array is covered with an anti-reflection coating layer with a thickness of 80-150 nm.

7. The retinal based, prismatic, point expansion technology lens for slowing axial elongation according to claim 1, wherein: The prism layer (1) has an anti-reflective layer on the side away from the eyeball.

8. The retinal periphery based prismatic point expansion technology based axial length delay lens of claim 1 or 3, wherein: The distribution density of the point diffusion array decreases gradually from the center to the edge, with a density change rate of 5-15 points / mm² per millimeter.

9. The retinal based point spread diffraction technology lens for slowing axial elongation according to claim 7, wherein: The outer surface of the anti-reflective layer is also provided with an anti-scratch layer, which is a silica nanoparticle reinforced resin layer with a thickness of 50-100μm and a Mohs hardness ≥6.

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