Method for determining an improved design for a progressive lens

Patent metadata

Field	Value
Publication number	US-10969607-B2
Application number	US-201916259912-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Jul 27, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

The current disclosure is directed to a method for determining an improved design for a progressive spectacle lens. Further, there are provided a method for manufacturing a progressive spectacle lens, a system for determining an improved design for a progressive spectacle lens, a non-transitory computer program and a progressive spectacle lens.

First claim

What is claimed is:

1. A computer-implemented method for determining an improved design for a progressive spectacle lens, the method comprising the steps of:
a) inputting measured aberration information of a wearer's eye into the computer comprising a non-transitory computer readable medium (CRM), wherein the CRM comprises a program code stored on the CRM;
b) generating in the computer via the program code an aberration information map of the wearer's eye, the aberration information map comprising lower-order aberrations of the wearer's eye and higher-order aberrations of the wearer's eye, wherein the lower-order aberrations are aberrations up to and including second-order, wherein second-order aberrations vary as a function of the square of the distance of a center of the pupil of the wearer's eye;
c) generating in the computer via the program code an initial design optical power distribution map and a corresponding initial design of the progressive spectacle lens in the computer, wherein the initial design optical power distribution map and corresponding initial design are generated via the program code incorporating information pertaining to only the lower-order aberrations of the wearer's eye and the lower-order aberrations of the progressive spectacle lens, and wherein the program code is programmed to assume a predetermined position and orientation of said progressive spectacle lens in front of said wearer's eye as well as a predetermined model for the distances and positions in space for a plurality of objects in front of the wearer's eye viewed by the wearer;
d) generating in the computer via the program code a perceived optical power distribution map indicative of theoretical power distribution perceived by the wearer's eye based on the initial design of the progressive spectacle lens, wherein the program code incorporates information pertaining to the lower-order aberrations and the higher-order aberrations of the wearer's eye of step b) as well as the lower-order aberrations and the higher-order aberrations of the progressive spectacle lens, and wherein the program code is programmed to assume said predetermined position and orientation of said progressive spectacle lens in front of said wearer's eye as well as said predetermined model for the distances and positions in space for a plurality of objects in front of the wearer's eye viewed by the wearer of step c);
e) generating in the computer via the program code an improved design optical power distribution map, wherein the program code translates the initial design optical power distribution map of the progressive spectacle lens of step c) and/or rotates the initial design optical power distribution map of the progressive spectacle lens of step c), such that a deviation between the perceived optical power distribution map of step d) and the translated and/or rotated initial design optical power distribution map is minimized;
f) generating in the computer via the program code the improved design of the progressive spectacle lens by at least one of:
translating and/or rotating the initial design of the progressive spectacle lens of step c) according to the translation and/or rotation determined in step e),
generating a starting design of the progressive spectacle lens that minimizes the aberrations based on the improved design optical power distribution map of step e) as a target design optical power distribution,

g) storing the improved design of the progressive spectacle lens onto an output device; and
h) transmitting the stored improved design of the progressive spectacle lens to a manufacturing unit.

2. The method of claim 1 , wherein the lower-order aberrations and the higher-order aberrations of the progressive spectacle lens are expressed as Zernike polynomials.

3. A computer-implemented method for determining an improved design for a progressive spectacle lens, the method comprising the steps of:
a) inputting measured aberration information of a wearer's eye into the computer comprising a non-transitory computer readable medium (CRM), wherein the CRM comprises a program code stored on the CRM;
b) generating in the computer via the program code an aberration information map of the wearer's eye, the aberration information map comprising lower-order aberrations of the wearer's eye and higher-order aberrations of the wearer's eye, wherein the lower-order aberrations are aberrations up to and including second-order, wherein second-order aberrations vary as a function of the square of the distance of a center of the pupil of the wearer's eye;
c) generating in the computer via the program code an initial design optical power distribution map and a corresponding initial design of the progressive spectacle lens in the computer, wherein the initial design optical power distribution map and corresponding initial design are generated via the program code incorporating information pertaining to only the lower-order aberrations of the wearer's eye and the lower-order aberrations of the progressive spectacle lens, and wherein the program code is programmed to assume a predetermined position and orientation of said progressive spectacle lens in front of said wearer's eye as well as a predetermined model for the distances and positions in space for a plurality of objects in front of the wearer's eye viewed by the wearer;
d) generating in the computer via the program code a perceived optical power distribution map indicative of theoretical power distribution perceived by the wearer's eye based on the initial design of the progressive spectacle lens, wherein the program code incorporates information pertaining to the lower-order aberrations and the higher-order aberrations of the wearer's eye of step b) as well as the lower-order aberrations and the higher-order aberrations of the progressive spectacle lens, and wherein the program code is programmed to assume said predetermined position and orientation of said progressive spectacle lens in front of said wearer's eye as well as said predetermined model for the distances and positions in space for a plurality of objects in front of the wearer's eye viewed by the wearer of step c);
e) generating in the computer via the program code an improved design optical power distribution map, wherein the program code translates the initial design optical power distribution map of the progressive spectacle lens of step c) and/or rotates the initial design optical power distribution map of the progressive spectacle lens of step c), such that a deviation between the perceived optical power distribution map of step d) and the translated and/or rotated initial design optical power distribution map is minimized;
f) generating in the computer via the program code the improved design of the progressive spectacle lens by at least one of:
translating and/or rotating the initial design of the progressive spectacle lens of step c) according to the translation and/or rotation determined in step e),
generating a starting design of the progressive spectacle lens that minimizes the aberrations based on the improved design optical power distribution map of step e) as a target design optical power distribution,

q) storing the improved design of the progressive spectacle lens onto an output device;
h) transmitting the stored improved design of the progressive spectacle lens to a manufacturing unit; and,

wherein said step a) further comprises determining the measured aberration information of a wearer's eye with a wavefront aberrometer configured to measure a wavefront indicative of refractive properties of the wearer's eye.

4. A method for manufacturing a progressive spectacle lens, the method comprising the following steps:
determining an improved design of the progressive spectacle lens, wherein said determining an improved design of the progressive sp

Assignees

• Zeiss Carl Vision Int Gmbh
• Spratt Ray Steven

Inventors

• Spratt Ray Steven
• Kelch Gerhard

Classifications

• G02C7/061 Primary

  Spectacle lenses with progressively varying focal power · CPC title

• G02C2202/22

  Correction of higher order and chromatic aberrations, wave front measurement and calculation · CPC title

• G02C7/027 Primary

  considering wearer's parameters · CPC title

• G02C7/028

  Special mathematical design techniques · CPC title

• G02C7/063

  Shape of the progressive surface · CPC title