Title:
EYE TRACKING AND POSITIONING SYSTEM FOR A REFRACTIVE LASER SYSTEM
Document Type and Number:
WIPO Patent Application WO2001010338
Kind Code:
A9
Abstract:
An eye tracking, and positioning system (10) for use with a refractive laser system (14) includes a camera interface (30), a computer (12), and a system for moving the patient relative to the laser beam. The computer (12) includes a video frame grabber (32) which extracts images of the eye from the camera (22), and is programmed to perform an eye tracking algorithm. The eye tracking algorithm calculates the exact center of the eye pupil, and compares the center with the desired location of the laser beam, as determined by a surgeon, with an image processing algorithm. If the relative location of the eye center, the laser beam fall outside a predetermined value, the patient chair (42), and thereby the patient, is repositioned relative to the laser beam, as opposed to the laser beam being repositioned relative to the patient. The repositioning counters the movement of the eye.
Inventors:
FREEMAN JERRE M
FREEMAN JAMES F
WILLIAMS ROY E
FREEMAN JAMES F
WILLIAMS ROY E
Application Number:
PCT/US2000/021882
Publication Date:
September 06, 2002
Filing Date:
August 10, 2000
Export Citation:
Assignee:
MEMPHIS EYE & CATARACT ASSOCIA (US)
International Classes:
A61B3/113; A61F9/007; A61F9/01; A61G13/00; A61G13/02; A61G15/00; A61G15/02; A61F9/008; (IPC1-7): A61B18/18
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