Method for determining the topography of the cornea of an eye

US10893799B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Manfred Dick · Gefell, DE
• Ferid Bajramovic · Jena, DE
• Wei-Jun Chen · Zhejiang, CN
• Tobias Bühren · Magdala, DE
• Matthias Reich · Jena, DE
• Jörg Meissner · Jena, DE
• Martin Kühner · Bad Klosterlausnitz, DE

Key dates

• Filing date: Sep 5, 2019
• Grant date: Jan 19, 2021
• Expiry date: Sep 5, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/18
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for determining the topography of the cornea of an eye on the basis of an optical, contactless data capture. In the method for determining the topography of the cornea of an eye, which is based on a deflectometric method, the deflectometric measurements are carried out with the aid of a keratometric method by virtue of additional OCT-based scans being made at the keratometric measurement points, wherein the two measurement systems are registered to one another and both the keratometric and the OCT-based measurement values are recorded and used for mutual calibration to determine and output the topographic data. The proposed method serves to determine the topography of the cornea of an eye. It is helpful to ascertain the topography in order to be able to draw conclusions about possible pathological changes. Moreover, the exact measurement of the corneal topography is of great importance for correcting refractive errors.