DETECTION OF CIRCULAR LIGHT SIGNALS IN RELATION TO SHAPE AND COLOR IDENTIFICATION.
Progress rept., 1 Dec 64-1 Feb 65,
ISTITUTO NAZIONALE DI OTTICA FLORENCE (ITALY)
Pagination or Media Count:
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
- Anatomy and Physiology