EFFECT OF STIMULUS SIZE, DURATION, AND RETINAL LOCATION UPON THE APPEARANCE OF COLOR
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
The names given to special visual stimuli from 480 to 610 mu and to a white-light test stimulus were obtained, using two diameters of stimulus fields. The experiment was designed to test the hypothesis that normal color vision is replaced by tritanopic vision in all parts of the retina if the total luminous energy is sufficiently reduced. The results obtained with four observers confirm the presence of tritanopia when small, brief stimuli are viewed foveally, but fail to confirm it in the periphery. Reduced color vision in the periphery is apparently characteristic of deuteranomaly, which ends ultimately in colorless vision. These results are discussed as giving support to the notion that foveal tritanopia is due to the depressed sensitivity of the blue receptor mechanism found in the central fovea.
- Anatomy and Physiology