Full-spectrum cone sensitivity functions for X-chromosome-linked anomalous trichromats.
We derived the cone fundamentals for X-chromosome-linked anomalous trichromats for the wavelength range of 400-700 nm. Pigment templates were constructed from the cone fundamentals of normal trichromats after correction for ocular media absorption. The resultant retinal-level sensitivities had small irregularities in the short-wavelength region that were smoothed. The pigment templates, expressed as quantal sensitivities, were then shifted on a frequency abscissa to solve for the lambda max of the pigments of anomalous trichromats needed to predict average anomaloscope matching data. We found that the protanomalous M- and L'-cone pigments are separated by 10 nm and the deuteranomalous M'- and L-cone pigments are separated by 6 nm (rounded to the nearest nanometer), where M and L indicate middle- and long-wavelength sensitive, respectively. The triads of peak wavelengths for the corneal energy-based sensitivities were as follows: normal: 440, 543, and 566 nm; protanomalous: 440, 543, and 553 nm; and deuteranomalous: 440, 560, and 566 nm.
DeMarco
P
P
Visual Sciences Center, University of Chicago, Illinois 60637.
Pokorny
J
J
Smith
V C
VC
D000328:Adult; D003117:Color Vision Defects / Q000235:genetics* / Q000503:physiopathology; D008040:Genetic Linkage; D006801:Humans; D008027:Light; D008297:Male; D010786:Photoreceptor Cells / Q000503:physiopathology*; D011601:Psychophysics; D012168:Retinal Pigments / Q000737:chemistry*; D012684:Sensory Thresholds; D014960:X Chromosome
D012168:Retinal Pigments