Abstract

Zegers’ colorimeter, appropriately modified, was employed to determine the spectral sensitivity of one deuteranopic, two deuteranomalous, and two normal subjects. Absolute threshold data were collected using a 25-min field and CFF curves were determined for both 50-min and 100-min fields. The sensitivity relationships among the subjects differed markedly depending upon technique, flicker rate, and field size. The results seem to indicate that the flicker situation provides a kind of information different from that obtained when absolute thresholds or visual acuities are studied. Research directed toward the relationship between flicker and absolute threshold measures of spectral sensitivity may provide important new data bearing on theories of color vision and color defect.

© 1961 Optical Society of America

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