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

A method for monitoring fixation of a patient's eye throughout capture of the patient's eye's biometric measurement data, in which information relating to the fixation is extracted, depending on different recording modes, from already available or additionally captured recordings and/or data, comprising:

• a) recording a central retinal OCT scan with absolute fixation information,
• b) recording a frontal image with relative fixation information at the same time as, or immediately before or after, the central retinal OCT scan with at least partly diffuse lighting,
• c) recording further frontal images with relative fixation information as continuously as possible over time,
• d) checking a fixation state on a basis of the central retinal OCT scan,
• e) should a correct fixation be present, Assuming the correct fixation for the frontal image recorded in method step b),
• f) calculating a difference vector for each frontal image recorded in method step c), said difference vector describing the deviations from the frontal image recorded in method step b),
• g) comparing the calculated difference vectors of the frontal images recorded in method step c) with a defined threshold, wherein
• h) a correct fixation for the recorded frontal images is assumed if the thresholds are undershot and no correct fixation is assumed if the thresholds are overshot and
• i) use is only made of the biometric measurement data captured just before, at the same time as or just after the frontal images with the correct fixation.