Accession Number : AD0715621

Title :   Retinal Areas of Color Perception by Rods and Long-Wave Cones and Selective Isomerization of Rhodopsin Photoproducts.

Descriptive Note : Final rept.,

Corporate Author : POLAROID CORP CAMBRIDGE MASS

Personal Author(s) : McCann,John J. ; Hall,John A. , Jr

Report Date : 30 NOV 1968

Pagination or Media Count : 64

Abstract : This report consists of two section examining two properties of the visual system. The first determined over what areas of the central retina the rods and long-wave cones can interact to produce color sensations. The experiments consisted of selectively bleaching areas of the retina with brilliant flashes of light. These flashes caused a particular area of the retina to be flash blinded yet the subject could still see with the unbleached portion. The rods and long-wave cones can interact to produce color sensations from 5 degrees to 20 degrees radius for most observers tested. The second investigated the hypothesis that selective irradiation of the photoproducts of rhodopsin might reduce the afterimage generated by the bleaching of rhodopsin. A xenon flash device was built that was capable of delivering large quantities of energy in 300 microseconds. This device was used to see whether the addition of energy could increase the rate of fading of an afterimage. The addition of either long-wave or short-wave visable energy did not increase the rate of fading of the afterimage under the described conditions. (Author)

Descriptors :   (*RETINA, COLOR VISION), (*FLASHBLINDNESS, *EYE PIGMENTS), PHYSIOLOGY, PHOTOSENSITIVITY(BIOLOGICAL), VISION, VISUAL PERCEPTION, THRESHOLDS(PHYSIOLOGY)

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE