STUDIES ON THE PHYSIOLOGICAL COLOR BLINDNESS OF THE HUMAN FOVEA WITH THE POLARIZATION METHOD
1951 年 2 巻 p. 50-59
詳細
1951 年 2 巻 p. 50-59
It was shown by König, Willmer and Wright that the center of the fovea of normal man is blue-blind, when a test object of reduced visual angle is used. In order to elucidate the mechanism of this physiological color blindness, retinal processes were analyzed by means of Motokawa's method.
1. It was found that 4 kinds of color processes, red, yellow, green and blue exist at the fovea.
2. As the test patch was reduced in visual angle, the red and greenprocesses became predominant over the yellow and blue processes.
3. At the center of the fovea there was no measurable Y, and B was found also small.
4. These findings account for Hartridge's observation that sensations of red and blue-green are predominant over those of yellow and blue, when small test fields are used.
5. The notch found in the luminosity curve, which was obtaind by Walters and Wright from the foveal center, is really due to the lack of the yellow receptor, as Hartridge surmised.
