Patent ID: 6409345
Filing Date: 2002-06-25
Classification: A61B

Abstract:
A device for measuring aberration refraction of an eye, comprising: a polarized light source producing a probing beam along a path to the eye; a telescopic system of lenses having an entrance pupil and an exit pupil; a two-coordinate deflector consisting of two single-coordinate deflectors separated by a zone; a deflection control unit; an aperture stop; a field stop; a collimating lens; a first position-sensitive photodetector with an objective lens operatively positioned for receiving non-polarized light reflected from the retina of the eye, a second position-sensitive photodetector for simultaneously receiving polarized light reflected from the cornea of the eye; and a data processing and display unit including a computer coupled to said first and second photodetectors for calculating total eye refraction aberration and the component caused by cornea aberration.