Optical lens with halo reduction

Patent metadata

Field	Value
Publication number	US-12547018-B2
Application number	US-202318498549-A
Country	US
Kind code	B2
Filing date	Oct 31, 2023
Priority date	Dec 21, 2011
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A method is provided for use in reducing a size of halo effect in an ophthalmic lens. The method comprises: providing data indicative of a given ophthalmic lens with a first pattern providing prescribed vision improvement, processing said data indicative of the features of the first pattern and generating data indicative of a variation of at least one feature of the first pattern resulting in a second pattern which maintains said prescribed vision improvement and reduces a size of halo effect as compared to that of the lens with the first pattern.

First claim

The invention claimed is:

1 . An optical lens comprising:
a first lens surface; a second lens surface spaced apart from the first lens surface; and a pattern of spaced apart protrusions or pits, the pattern affecting a focus of the optical lens; wherein: the pattern is across the first lens surface or is across the second lens surface; the pattern comprises, in at least a radial direction, an altered periodic pattern, the altered periodic pattern comprising variations of relative locations of adjacent spaced apart protrusions or pits from a periodic pattern; the pattern is a non-diffractive phase pattern; and the pattern has a variable period or pitch with radius that creates non-periodicity in the pattern.

2 . The optical lens of claim 1 , wherein the focus of the optical lens is a first focus provided by the first lens surface and the second lens surface.

3 . The optical lens of claim 2 , wherein the pattern of spaced apart protrusions or pits affects the first focus by providing an extended depth of focus.

4 . The optical lens of claim 1 , wherein the altered periodic pattern is configured to reduce a size of a halo effect as compared to a corresponding lens having the periodic pattern.

5 . The optical lens of claim 1 , wherein the periodic pattern defines a bi-focal apodized diffractive optical mask.

6 . The optical lens of claim 2 , wherein the first focus provides a vision improvement for distance vision of a recipient of the optical lens and wherein the pattern of spaced apart protrusions or pits substantially maintains the vision improvement.

7 . The optical lens of claim 6 , wherein the altered periodic pattern is configured to reduce a halo pattern as compared to a corresponding lens having the periodic pattern.

8 . An optical lens comprising:
a first lens surface; a second lens surface spaced apart from the first lens surface; and a pattern of spaced apart protrusions or pits, the pattern affecting a focus of the optical lens; wherein: the pattern is across the first lens surface or is across the second lens surface; the pattern comprises, in at least a radial direction, an altered periodic pattern, the altered periodic pattern comprising variations of relative locations of adjacent spaced apart protrusions or pits from a periodic pattern; the pattern has a variable period or pitch with radius that creates non-periodicity in the pattern; the focus of the optical lens is a first focus provided by the first lens surface and the second lens surface; and the first focus provides a vision improvement for distance vision of a recipient of the optical lens and wherein the pattern of spaced apart protrusions or pits substantially maintains a modulation transfer function at a focal plane corresponding to the first focus.

9 . The optical lens of claim 8 , wherein the altered periodic pattern is configured to reduce a halo pattern as compared to a corresponding lens having the periodic pattern.

10 . An optical lens comprising:
a first lens surface; a second lens surface spaced apart from the first lens surface; and a non-diffractive phase pattern of varying refractive index materials across the lens, the varying refractive index materials comprising material embedded into the optical lens between the first lens surface and the second lens surface, the pattern affecting a focus of the optical lens; wherein the pattern of varying refractive index materials comprises, in at least a radial direction, an altered periodic pattern, the altered periodic pattern comprising a variable period or pitch with radius that creates non-periodicity in the pattern.

11 . The optical lens of claim 10 , wherein the focus of the optical lens is a first focus provided by the first lens surface and the second lens surface.

12 . The optical lens of claim 11 , wherein the pattern of varying refractive index materials affects the first focus by providing an extended depth of focus.

13 . The optical lens of claim 10 , wherein the altered periodic pattern is configured to reduce a size of a halo effect as compared to a corresponding lens having the periodic pattern of said altered periodic pattern.

14 . The optical lens of claim 11 , wherein the first focus provides a vision improvement for distance vision of a recipient of the optical lens and wherein the pattern affecting a focus of the optical lens substantially maintains the vision improvement.

15 . The optical lens of claim 14 , wherein the altered periodic pattern is configured to reduce a halo pattern as compared to a corresponding lens having the periodic pattern.

16 . The optical lens of claim 11 , wherein the first focus provides a vision improvement for distance vision of a recipient of the optical lens and wherein the pattern of varying refractive index materials substantially maintains a modulation transfer function at a focal plane corresponding to the first focus.

17 . The optical lens of claim 16 , wherein the altered periodic pattern is configured to reduce a halo pattern as compared to a corresponding lens having the periodic pattern of said altered periodic pattern.

18 . The ophthalmic lens of claim 1 , wherein the pattern further comprises at least one of the following: (i) deviation from a local period of the pattern; (ii) deviation from a local slope of the pattern, the local slope being either one of inner and outer slope; (iii) deviation from local maximum height of the protrusions in the pattern; (iv) deviation from local minimum height of the protrusions in the pattern; (v) producing additional, typically highly dense, pattern within the protrusions or pits of the pattern; and (vi) deviation from local pattern position.

19 . The optical lens of claim 8 , wherein the pattern further comprises at least one of the following: (i) deviation from a local period of the pattern; (ii) deviation from a local slope of the pattern, the local slope being either one of inner and outer slope; (iii) deviation from local maximum height of protrusions in the pattern; (iv) deviation from local minimum height of protrusions in the pattern; (v) producing additional, typically highly dense, pattern within the protrusions or pits of the pattern; and (vi) deviation from local pattern position.

20 . The optical lens of claim 9 , wherein the altered pattern further comprises at least one of the following: (i) deviation from a local period of the pattern; (ii) deviation from a local slope of the pattern, the local slope being either one of inner and outer slope; (iii) deviation from local maximum height of protrusions in the pattern; (iv) deviation from local minimum height of protrusions in the pattern; (v) producing additional, typically highly dense, pattern within one type of features of the pattern; and (vi) deviation from local pattern position.

Assignees

• Brien Holden Vision Institute Ltd

Inventors

• Limon Ofer
• Zalevsky Zeev
• Zlotnik Alex
• Ben-Yaish Shai

Classifications

• A61F2002/1699

  Additional features not otherwise provided for · CPC title

• G02C7/02 Primary

  Lenses; Lens systems {; Methods of designing lenses} · CPC title