DETECTION OF CIRCULAR LIGHT SIGNALS IN RELATION TO SHAPE AND COLOR IDENTIFICATION

A small and brief circular spot was flashed at 7 degrees nasal to the fovea. Absolute threshold, color identification threshold, and threshold of perception of the circle were determined. The number of wrong responses given by the subject when attempting to identify the color of the signal and the d...

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Bibliographic Details
Main Authors: Ronchi,Lucia, Tittarelli,Rolando
Format: Report
Language:English
Subjects:
Anatomy and Physiology
COLOR VISION
INCANDESCENT LAMPS
ITALY
OPHTHALMOLOGY
OPTICAL FILTERS
PROBABILITY
RETINA
SIGNAL LIGHTS
SPACE(ROOM)
THRESHOLDS(PHYSIOLOGY)
VISION
VISUAL PERCEPTION
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Summary:A small and brief circular spot was flashed at 7 degrees nasal to the fovea. Absolute threshold, color identification threshold, and threshold of perception of the circle were determined. The number of wrong responses given by the subject when attempting to identify the color of the signal and the degeneration of apparent shape under degraded viewing conditions is presented. The radiation emitted by an incandescent lamp, 2800K, was filtered by filters. The threshold of circular shape identification was found to be slightly higher than that of color identification. The findigs were compared with the data reported in the current literature. Practical recommendations for the use of the data are given. (Author)