METHOD FOR VERY SENSITIVELY MEASURING DISTANCES AND ANGLES IN THE HUMAN EYE

摘要

A method for measuring distances and angles in the human eye in a highly sensitive manner in order to insert an intraocular lens having the correct refractive power during a cataract operation. The method is based on low coherence interferometry using the dual beam method, in which the time domain signals are detected using a spatially resolving sensor. The delay line of the interferometric measuring arrangement employed is continuously tuned and the low coherence illumination light source used to illuminate the retina of an eye is periodically modulated in terms of its brightness. The light signals reflected by the retina are captured by a sensor and detected in spatially resolved fashion. The disclosed method is used to measure the eye length of a cataractous eye. Even though the method is provided, in particular, for measuring already cataractous eyes, it can be used, in principle, to measure the axial length of all eyes.