Anomalous trichromatic color systems are examined within the framework of a three variable, bimodal opponent-colors theory. Specific types of anomaly are assumed to be related to specific changes in the normal photoreceptor distributions and to impairments in the normal chromatic response processes. The aberrant color equations, color sensations, and color discriminations of both protanomalous and deuteranomalous observers are shown to be meaningfully related to the postulated, systematically aberrant visual mechanisms.
DOROTHEA JAMESON and LEO M. HURVICH, "Theoretical Analysis of Anomalous Trichromatic Color Vision," J. Opt. Soc. Am. 46, 1075-1088 (1956)