Patent ID: 6626895
Filing Date: 2003-09-30
Classification: A61B,A61F

Abstract:
An ophthalmic laser beam delivery system comprising:an eye movement sensor for sensing a movement of an eye and generating an error control signal indicative of the eye movement, the eye movement sensor comprising means for delivering four substantially equal-energy light spots substantially evenly about an iris-pupil boundary of the eye for two-axis motion sensing each of the light spots delayed a different amount, and means for receiving reflections of the light spots from the iris-pupil boundary; and a beam angle adjustment system for receiving laser pulses produced by a laser source emitting radiation suitable for effecting a refractive correction of the eye, the beam angle adjustment system further for delivering the laser pulses to the eye along a beam path and being responsive to the error control signal so that the beam path of the laser pulses is adjusted in response to the eye movement.