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Science 9 April 1971:
Vol. 172. no. 3979, pp. 180 - 184
DOI: 10.1126/science.172.3979.180
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Articles

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

H. G. Sperling 1 and R. S. Harwerth 1

1 University of Texas Graduate School of Biomedical Sciences and Institute of Ophthalmology, Texas Medical Center, Houston 77025

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.


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