Fixation control device and method for controlling the fixation of an eye

US9173559B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Michael Bergt · Weimar, DE
• Gregor Stobrawa · Jena, DE
• Georg Sluyterman van Langeweyde · Jena, DE
• Mark Bischoff · Jena, DE

Key dates

• Filing date: Jun 22, 2010
• Grant date: Nov 3, 2015
• Expiry date: Dec 8, 2032

Classification

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

Abstract

With some ophthalmological instruments, the patient to be examined or treated needs to gaze in a defined direction. Accordingly, the operator needs the most objective possible information as to whether the patient actually fixates the fixating target or when this may no longer be the case. The invention makes it possible to monitor fixation economically with a short reaction time and with high accuracy. Monitoring of the fixation of an eye is accomplished in an economical manner with a short reaction time and high accuracy through spectroscopic detection of fixation, particularly by identifying a reflection at the fovea or foveola based on different reflectance factors compared to the rest of the retina.