Method for the continuous control of the fixation of a patient's eye during the detection of biometric measurement data of the patient's eye

US11766171B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Ferid Bajramovic · Jena, DE
• Wei-Jun Chen · Zhejiang, CN
• Tobias Bühren · Magdala, DE

Key dates

• Filing date: Jan 17, 2019
• Grant date: Sep 26, 2023
• Expiry date: Dec 11, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/113
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for capturing biometric measurement data of a patient's eye, in which the fixation is monitored during the entire biometric measurement. Information in respect of the fixation is extracted, depending on the different recording modes, from already available or additionally captured recordings and/or data. Central retinal OCT scans with absolute fixation information and frontal images with relative fixation information with or without at least partial diffuse lighting are used. On the basis of this extracted fixation information, the subsequent evaluation only uses the captured biometric measurement data captured just before, at the same time as or just after frontal images with the correct fixation. The method can also be applied to different measurement tasks, in which use is made of different measurement modes and in which the alignment of the measurement object is important for the measurement results.