Method and device for the subjective determination of aberrations of higher order

US7338173B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Manfred Dick · Gefell, DE
• Eckhard Schroeder · Eckental, DE
• Holger Maeusezahl · Jena, DE

Key dates

• Filing date: Jan 28, 2002
• Grant date: Mar 4, 2008
• Expiry date: Nov 23, 2023

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/028
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for the subjective determination of aberrations of higher orders Xi in an optical system, in particular in an eye includes at least one observation channel into which defined plates can be introduced, the individual plates having optically active structures which correspond to a defined Zernike polynomial and to a defined amplitude, at least one order Xi of the Zemike polynomial being greater than two.