Abstract

The absolute-threshold spectral-sensitivity curves of deuteranopes and protanopes were compared with the luminosity curves obtained by heterochromatic flicker photometry and side-by-side brightness matching. The luminosity measurements between 500 and 700 nm paralleled the absolute-threshold spectral sensitivity over a luminance range of 4–400 td. CFF–log I functions were obtained at six spectral wavelengths from deuteranopes and protanopes. At 580 nm, where the absolute threshold gave identical estimates of sensitivity for deuteranopes and protanopes, the deuteranopes showed a steeper CFF–log I slope than protanopes. At 4000 td, the deuteranopes had CFF thresholds of 50 cps compared with 40 cps for protanopes.

© 1972 Optical Society of America

Luminosity Functions of Normal, Deuteranomalous, and Deuteranopic Subjects as Determined by Absolute Threshold and CFF Measurements*

William E. Collins
J. Opt. Soc. Am. 51(2) 202-206 (1961)

Large-field trichromacy in protanopes and deuteranopes*

Vivianne C. Smith and Joel Pokorny
J. Opt. Soc. Am. 67(2) 213-220 (1977)

Neutral Points in 138 Protanopes and Deuteranopes

Gordon L. Walls and Gordon G. Heath
J. Opt. Soc. Am. 46(8) 640-649 (1956)

The Color Perceptions of Deuteranopic and Protanopic Observers

Deane B. Judd
J. Opt. Soc. Am. 39(3) 252-256 (1949)

Spectral sensitivity by constant CFF: effect of chromatic adaptation*

Lawrence E. Marks and Marc H. Bornstein
J. Opt. Soc. Am. 63(2) 220-226 (1973)