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

摘要

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.

主权项

1. A fixation monitoring device for an ophthalmological instrument, comprising:
a fixation light source configured to emit visible light; optics configured to image the fixating light source on a fundus; and a detector unit configured to implement spectroscopic detection of a fixation of an eye, the spectroscopic detection being based on difference in spectral reflectivity between a fovea of the eye and a surrounding retina of the eye.