The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2024
Filed:
Aug. 15, 2023
Applicant:
Carl Zeiss Vision International Gmbh, Aalen, DE;
Inventors:
Assignee:
Carl Zeiss Vision International GmbH, Aalen, DE;
Primary Examiner:
Int. Cl.
CPC ...
A61B 3/103 (2006.01); A61B 3/00 (2006.01); A61B 3/14 (2006.01);
U.S. Cl.
CPC ...
A61B 3/103 (2013.01); A61B 3/0008 (2013.01); A61B 3/14 (2013.01);
Abstract
Apparatuses and methods for determining a refractive error of an eye are disclosed. A series of images of light coming from an eye are captured with varying optical powers, and the refractive error is then calculated based directly on the series of images used as approximate point spread functions. The calculation includes determining a modulation transfer area as a function of meridian angle and optical power in an angle range from 0° to 180° based on the series of images, and to calculate the refractive error based on the modulation transfer area as a function of angle and optical power.