Red-Green Cone Interactions in the Increment-Threshold Spectral Sensitivity of Primates

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Science  09 Apr 1971:
Vol. 172, Issue 3979, pp. 180-184
DOI: 10.1126/science.172.3979.180


Threshold spectral sensitivity of primate eyes is the upper envelope of the sensitivity of three response channels. Sensitivity in the green and red channels is modeled as linear difference functions reflecting neural interaction between cones containing photopigments with 535- and 575-nanometer peaks. Sensitivity in the blue channel seems determined by a single class of cones containing a 445-nanometer photopigment.