Apparatus and method for ascertaining a type of spectacle lens and apparatus and method for determining a refractive power distribution of a progressive spectacle lens

Patent metadata

Field	Value
Publication number	US-10146064-B2
Application number	US-201715843952-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Jul 20, 2012
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

An apparatus is for ascertaining and outputting a type of spectacle lens suitable for a spectacle wearer with a visual characteristics providing device, for providing visual characteristics of the spectacle wearer, a needs providing device, for providing individual needs of the spectacle wearer, a spectacle lens type providing device, for providing a plurality of types of spectacle lenses having predetermined characteristics, a desired characteristics ascertaining device, for ascertaining desired characteristics of a type of spectacle lens using the provided visual characteristics and the provided individual needs of the spectacle wearer, an assigning device, for assigning at least one type of spectacle lens from among the plurality of types of spectacle lenses to the desired characteristics, on the basis of predetermined assignment rules, and a spectacle lens type outputting device, for outputting the at least one assigned type of spectacle lens. A method is for ascertaining and outputting a type of spectacle lens suitable for a spectacle wearer and also a computer program is for carrying out the method.

First claim

What is claimed is:

1. An apparatus for determining a refractive power distribution of a progressive spectacle lens for a spectacle wearer, the progressive lens having a distance portion, a near portion and an intermediate corridor connecting the distance portion and the near portion, the apparatus comprising:
a first providing unit configured to provide a measure for at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past, at least one of the at least one variable originating from a group including: i) dimension of the distance portion (D), ii) the dimension of the near portion (N), iii) gradient of power along a boundary between the distance portion and the intermediate corridor, iv) gradient of power along a boundary between the near portion and the intermediate corridor (S), v) inset, vi) length of and distribution of dioptric power along the intermediate corridor and vii) peripheral astigmatic error distribution outside the distance portion, near portion and intermediate corridor;
a second providing unit configured to provide current information relating to a visual impression of the spectacle wearer with the pair of progressive spectacles worn by the spectacle wearer in the past;
a third providing unit configured to provide current vision characteristics of the spectacle wearer;
a fourth providing unit configured to provide current individual needs of the spectacle wearer;
a determining unit configured to determine a second measure (ΔD, ΔN, ΔS) for a change to be strived for the at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past taking into consideration of the provided information relating to the current visual impression of the spectacle wearer with the pair of progressive spectacles worn by the spectacle wearer in the past; and,
a calculating unit configured to calculate the refractive power distribution of the progressive spectacle lens for the spectacle wearer taking into consideration the current vision characteristics of the spectacle wearer and the second measure for a change of the provided measure of the at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past.

2. The apparatus of claim 1 further comprising an outputting unit configured to output the refractive power distribution calculated by said calculating unit.

3. The apparatus of claim 1 , wherein the calculating unit is a first calculating unit, the apparatus further comprising a second calculating unit configured to calculate a movement path of a cutting tool for making a geometrical form of at least one surface of the progressive spectacle lens to achieve the refractive power distribution calculated by said first calculating unit.

4. A computer implemented method for determining a refractive power distribution of a progressive spectacle lens for a spectacle wearer, the progressive lens having a distance portion, a near portion and an intermediate corridor connecting the distance portion and the near portion, the computer implemented method comprising the steps of:
providing a measure for at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past, at least one of the at least one variable originating from a group including: i) dimension of the distance portion (D), ii) the dimension of the near portion (N), iii) gradient of power along a boundary between the distance portion and the intermediate corridor, iv) gradient of power along a boundary between the near portion and the intermediate corridor (S), v) inset, vi) length of and distribution of dioptric power along the intermediate corridor and vii) peripheral astigmatic error distribution outside the distance portion, near portion and intermediate corridor;
providing information relating to a current visual impression of the spectacle wearer with the pair of progressive spectacles worn by the spectacle wearer in the past;
providing current vision characteristics of the spectacle wearer;
providing current individual needs of the spectacle wearer;
determining a second measure (ΔD, ΔN, ΔS) for a change of the provided measure of the at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past taking into consideration the provided information relating to the current visual impression of the spectacle wearer with the pair of progressive spectacles worn by the spectacle wearer in the past; and,
calculating the refractive power distribution of the progressive spectacle lens for the spectacle wearer taking into consideration the provided current vision characteristics of the spectacle wearer and the determined second measure for a change of the provided measure of the at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past.

5. A method of making a progressive spectacle lens comprising the steps of:
providing a determined refractive power distribution of a progressive spectacle lens for a spectacle wearer, the progressive lens having a distance portion, a near portion and an intermediate corridor connecting the distance portion and the near portion, the refractive power distribution being determined by a computer implemented method including the steps of:
providing a measure for at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past, at least one of the at least one variable originating from a group including: i) dimension of the distance portion (D), ii) the dimension of the near portion (N), iii) gradient of power along a boundary between the distance portion and the intermediate corridor, iv) gradient of power along a boundary between the near portion and the intermediate corridor (S), v) inset, vi) length of and distribution of dioptric power along the intermediate corridor and vii) peripheral astigmatic error distribution outside the distance portion, near portion and intermediate corridor;
providing information relating to a current visual impression of the spectacle wearer with the pair of progressive spectacles worn by the spectacle wearer in the past;
providing current vision characteristics of the spectacle wearer;
providing current individual needs of the spectacle wearer;
determining a second measure (ΔD, ΔN, ΔS) for a change of the provided measure of the at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past taking into consideration the provided information relating to the current visual impression of the spectacle wearer with the pair of progressive spectacles worn by the spectacle wearer in the past;
calculating the refractive power distribution of the progressive spectacle lens for the spectacle wearer taking into consideration the provided current vision characteristics of the spectacle wearer and the determined second measure for a change of the provided measure of the at least one variable characterizing the refractive power distribution of a progressive spectacle lens of a pair of progressive spectacles worn by the spectacle wearer in the past; and,

making the progressive spectacle lens with the provid

Assignees

• Zeiss Carl Vision Int Gmbh
• Carl Zeiss Vision Ireland Ltd
• Zeiss Carl Vision Inc

Inventors

• Saur Konrad
• Begley Paraic
• Spratt Ray Steven
• Kratzer Timo

Classifications

• G06Q30/0633

  Managing shopping lists, e.g. compiling or processing purchase lists (shipping orders G06Q10/083; order filling G06Q10/087) · CPC title

• G02C7/061

  Spectacle lenses with progressively varying focal power · CPC title

• G06Q30/0621

  by configuring or customising goods or services · CPC title

• A61B3/0025 Primary

  characterised by electronic signal processing, e.g. eye models · CPC title

• G02C7/028 Primary

  Special mathematical design techniques · CPC title