Various methods for testing color blindness have been devised. In many of the tests commonly used, the light that reaches the retina of the subject's eye is reflected from bodies in which selective reflection and absorption of the pigments determine the wave lengths acting as a stimulus. It was thought worthwhile to try a series of tests in which narrow bands of relatively pure spectral colors were viewed directly. The apparatus for this purpose consisted of a constant deviation wave length spectrometer and a polarization spectrophotometer using the Brace prism. In addition to the test mentioned above, which was given to both the normal and color-blind subjects, the Ishihara, Holmgren, and Nagel tests were used for the color-blind subjects. A study of the comparison of these tests is being made to determine the degree of correlation.
Proceedings of the Iowa Academy of Science
©1933 Iowa Academy of Science, Inc.
Benedict, A. A.
"Discrimination of Relatively Pure Spectral Colors by Normal and Color-Blind Subjects,"
Proceedings of the Iowa Academy of Science, 40(1), 148-148.
Available at: https://scholarworks.uni.edu/pias/vol40/iss1/72