AbstractSome of the principal neurophysiological findings in primate retina are related to the postulated R–G, B–Y, and luminance channels of psychophysical color theory. The concept of on‐ and off‐center channels, weak and strong R–G opponency, tonic and phasic systems, and the curious asymmetry of the B–Y channel and its relationship to the detection of whiteness and blueness a
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