CN-121995651-A - Defocused lens and design method thereof

CN121995651ACN 121995651 ACN121995651 ACN 121995651ACN-121995651-A

Abstract

The embodiment of the invention provides a defocused lens and a design method thereof, wherein N annular optical correction areas and N annular optical defocused areas are alternately arranged on the radial outer side of 1 circular optical correction area and concentric. Ratio of total area of annular optical defocus region to total area of defocus lens From 0.55 to 0.58. The optical power of the optical correction area is first power, and the optical power of the optical defocus area is second power. Optical correction zone image side focus Image space focus in annular optical correction area Is an image side of the image plane. With the application of the embodiment, the plurality of optical correction areas form clear images on the retina of a human eye to correct the refractive error of the human eye, the plurality of optical defocus areas form images in front of the retina to generate myopia defocus to delay the increase of the eye axis, the optical correction areas and the optical defocus areas are alternately arranged, the peripheral defocus effect is realized by controlling the areas of the optical correction areas and the optical defocus areas, the visual quality is improved, and the myopia progression is delayed.

Inventors

XIE GONGXING
NIE YUN
Xiang huazhong
ZHANG DAWEI
Wu Menglou

Assignees

明月镜片股份有限公司
上海理工大学

Dates

Publication Date: 20260508
Application Date: 20260213

Claims (10)

1. A defocus lens comprising 1 circular optical correction zone, N annular optical correction zones, and N annular optical defocus zones; N satisfies the following conditions: ; The circular optical correction area is arranged at the optical center of the defocused lens; The N annular optical correction areas and the N annular optical defocus areas are alternately arranged on the radial outer side of the circular optical correction area, and the N annular optical correction areas, the N annular optical defocus areas and the circular optical correction area are concentric; the ratio of the total area of the annular optical defocusing area to the total area of the defocusing lens The method meets the following conditions: ; the focal power of the circular optical correction area and the N annular optical correction areas are first focal power, the focal power of the N annular optical defocus areas is second focal power, and the first focal power is different from the second focal power; Image space focal points of the circular optical correction area and the N annular optical correction areas Image space focus of the N annular optical defocused areas The method meets the following conditions: Is positioned at Is an image side of the image plane.
2. The defocus lens of claim 1 wherein the sagittal height of the defocus lens satisfies an aspheric equation.
3. The defocus lens of claim 1 wherein adjacent said optical correction zone and said annular optical defocus zone satisfy a cosine function.
4. The out-of-focus lens of claim 1, wherein N satisfies: 。
5. The defocus lens of claim 4 wherein the annular optical defocus zone has a width The method meets the following conditions: the width of the 6 annular optical defocus zones from the center to the edge of the defocus lens 、、、、、 The method meets the following conditions: , , , , , 。
6. The defocus lens of claim 4 wherein the ratio of the total area of the annular optical defocus region to the total area of the annular optical correction region The method meets the following conditions: 。
7. The defocus lens of claim 4 wherein the defocus amount Df and the central diopter D of the annular optical defocus region satisfy: 。
8. The defocus lens of claim 4 wherein the radius R of the defocus lens and the radius of the circular optical correction zone The method meets the following conditions: , The outer circle radius of the 6 annular optical defocusing areas from the center to the edge of the defocusing lens 、、、、、 The method meets the following conditions: , , , , , 。
9. The defocused lens of claim 1, wherein the lens material of the defocused lens is a high oxygen-permeable silicone hydrogel, the water content of the defocused lens Center thickness The method meets the following conditions: , 。
10. a method of designing a defocus lens, the method comprising: Provided is a defocusing lens, wherein the defocusing lens comprises 1 circular optical correction area, N annular optical correction areas and N annular optical defocusing areas, and N satisfies: The circular optical correction areas are arranged at the optical center of the defocusing lens, the N annular optical correction areas and the N annular optical defocusing areas are alternately arranged at the radial outer sides of the circular optical correction areas, the N annular optical defocusing areas and the circular optical correction areas are concentric, and the ratio of the total area of the annular optical defocusing areas to the total area of the defocusing lens is The method meets the following conditions: The focal power of the circular optical correction area and the N annular optical correction areas are all first focal power, the focal power of the N annular optical defocus areas is second focal power, the first focal power is different from the second focal power, and the focal points of the circular optical correction area and the N annular optical correction areas are at the image space Image space focus of the N annular optical defocused areas The method meets the following conditions: Is positioned at Is an image side of the image plane.

Description

Defocused lens and design method thereof Technical Field The invention relates to the technical field of optical lens design, in particular to a defocused lens and a design method thereof. Background Visual function is a key way for humans to obtain external information. In the field of teenager myopia correction, two main types of treatment methods, namely optical intervention and surgical operation, are commonly adopted in clinical practice. Optical intervention involves wearing optical instruments such as frame lenses, contact lenses, etc., and surgical procedures are mainly performed by adjusting the refractive characteristics of the cornea using laser techniques. However, the existing correction methods have obvious defects that the optical appliance can reduce visual quality and has adaptation trouble, and the surgery has permanently changed characteristics and is limited by factors such as age. When the optical instrument is worn for correction, the single-lens only provides single diopter, so that a user needs to continuously adjust eye muscles when looking near an object, visual fatigue is easy to be caused, myopia degree and eye axis change can be aggravated, the double-lens can generate obvious image jump and damage visual fluency when the vision is converted although distinguishing between a far vision zone and a near vision zone, and the progressive multifocal lens can realize vision transition of different distances through continuously changed diopter, thereby effectively relieving regulatory fatigue, but the peripheral distortion area of the progressive multifocal lens can interfere dynamic visual performance. The mainstream defocusing lenses in the market at present are designed by adopting variable width or discrete defocusing rings, and the problems of unstable defocusing amount, poor imaging definition and the like are generally existed. Accordingly, there is a need to provide a lens and a design method thereof that can improve visual quality and delay progression of myopia. Disclosure of Invention The embodiment of the invention aims to provide a defocused lens and a design method thereof, so as to improve visual quality and delay myopia progression. The specific technical scheme is as follows: In a first aspect, embodiments of the present invention provide an out-of-focus lens comprising 1 circular optical correction zone, N annular optical correction zones, and N annular optical out-of-focus zones; N satisfies the following conditions: ; The circular optical correction area is arranged at the optical center of the defocused lens; The N annular optical correction areas and the N annular optical defocus areas are alternately arranged on the radial outer side of the circular optical correction area, and the N annular optical correction areas, the N annular optical defocus areas and the circular optical correction area are concentric; the ratio of the total area of the annular optical defocusing area to the total area of the defocusing lens The method meets the following conditions:; the focal power of the circular optical correction area and the N annular optical correction areas are first focal power, the focal power of the N annular optical defocus areas is second focal power, and the first focal power is different from the second focal power; Image space focal points of the circular optical correction area and the N annular optical correction areas Image space focus of the N annular optical defocused areasThe method meets the following conditions: Is positioned at Is an image side of the image plane. In one possible embodiment, the sagittal height of the defocus lens satisfies an aspheric equation. In one possible embodiment, the adjacent optical correction zone and the annular optical defocus zone satisfy a cosine function. In one possible embodiment, the N satisfies:。 In one possible embodiment, the annular optical defocus region has a width The method meets the following conditions: the width of the 6 annular optical defocus zones from the center to the edge of the defocus lens 、、、、、The method meets the following conditions:,,,,,。 In one possible embodiment, the ratio of the total area of the annular optical defocus region to the total area of the annular optical correction region The method meets the following conditions:。 in one possible embodiment, the defocus amount Df and the central diopter D of the annular optical defocus region satisfy: 。 in one possible embodiment, the radius R of the defocus lens and the radius of the circular optical correction zone The method meets the following conditions:, The outer circle radius of the 6 annular optical defocusing areas from the center to the edge of the defocusing lens 、、、、、The method meets the following conditions:,,,,,。 In one possible embodiment, the lens material of the defocused lens is a high oxygen-permeable silicone hydrogel and the water content of the defocused lens Center thicknessThe method meets the following conditions