Abstract

We describe a method of deriving the absorption curves of the anomalous pigments of sex-linked anomalous color vision. The approach is based on combining Rayleigh-equation data with standard shapes for the visual pigments. For normal pigments, we used a standard shape derived from corrected dichromatic sensitivity curves, with λ_max = 534 and 560 nm for the middle- and long-wavelength sensitivities, respectively. For anomalous pigments, two shapes were evaluated: (i) Dartnall’s shape, defined by rhodopsin, and (ii) the shape defined by the normal middle- and long-wavelength-sensitive human cone photopigments. When the anomalous pigments are assumed to have the absorption spectrum of rhodopsin, no solutions fitting the protanomalous and deuteranomalous Rayleigh equations were possible. When the anomalous pigments are assumed to have the absorption spectrum of the normal middle- and long-wavelength-sensitive human cone photopigments, the solutions were an anomalous long-wavelength sensitive pigment for the protanomal peaking at 541.6 nm, and an anomalous middle-wavelength sensitive pigment for the deuteranomal, peaking at 554.6 nm.

© 1973 Optical Society of America

Full-spectrum cone sensitivity functions for X-chromosome-linked anomalous trichromats

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