Device for reliably determining biometric measurement variables of the whole eye

US10694941B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Ralf Ebersbach · Schmölln, DE
• Martin Hacker · Jena, DE
• Gerard Antkowiak · Jena, DE
• Peter Klopfleisch · Jena, DE
• Ferid Bajramovic · Jena, DE
• Tobias Bühren · Magdala, DE
• Matthias Reich · Jena, DE

Key dates

• Filing date: May 1, 2017
• Grant date: Jun 30, 2020
• Expiry date: Jul 16, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/1173
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for determining biometric variables of the eye, as are incorporated in the calculation of intraocular lenses including a multi-point keratometer and an OCT arrangement. The keratometer measurement points are illuminated telecentrically and detected telecentrically and the OCT arrangement is designed as a laterally scanning swept-source system with a detection region detecting the whole eye over the whole axial length thereof. The multi-point keratometer ensures that a sufficient number of keratometer points are available for measuring the corneal surface. By contrast, telecentricity ensures that the positioning inadequacies of the measuring instrument in relation to the eye to be measured do not lead to a local mismatch of the reflection points. The swept-source OCT scan detects the whole eye over the length thereof so that both anterior chamber structures and retina structures can be detected and a consistent whole eye image can be realized.