Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1989-03-21
1990-11-27
Dzierzynski, Paul M.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
A61B 314
Patent
active
049731491
ABSTRACT:
A system for eye movement detection is disclosed that utilizes an infrared light emitting diode mounted coaxially in front of the lens of an infrared sensitive video camera for remotely making images of the eye of a computer operator. The reflected light causes bright eye effect which outlines the pupil as brighter than the rest of the eye and also causes an even brighter small glint from the surface of the cornea. The computer includes graphic processing which takes a video image, digitizes it into a matrix of pixels and analyzes the matrix. Using special algorithms the analysis determines the location of the pupil's center and the location of the glint relative to each other and with this information determines where the eye is gazing. If the eye-gaze is for a predetermined time at images in selected areas on the computer screen, the area is selected and results in actuation of other devices or the presentation of additional images on the screen. This is especially useable for handicapped persons to control their environment. Other uses include operator interfacing with workstations, cockpit controls and in industrial environments.
REFERENCES:
patent: 3986030 (1976-10-01), Teltscher
patent: 4623230 (1986-11-01), Weinblatt
patent: 4648052 (1987-03-01), Friedman et al.
Center For Innovative Technology
Dzierzynski Paul M.
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