Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1992-11-10
1993-11-09
Perkey, W. B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
354402, 351210, G03B 1302, G03B 1700, A61B 314
Patent
active
052607348
ABSTRACT:
An eye direction detection apparatus has a light emitting system, a light receiving system, a detecting circuit, a memory and a circuit for correcting signals stored in the memory. The apparatus detects the eye direction by subtracting an error signal stored in the memory from video signals produced by the detecting circuit.
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English Language Abstract of Japanese 62-189415, Aug. 1987.
Methods and Design--Survey of Eye Movement Recording Methods, by Young and Sheena, Behavior Research Methods and Instrumentation, pp. 397-429 (vol. 7(5), 1975).
Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey W. B.
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