The unique color constancy of the human visual process is explained by precise mid-band (green) wavelength interacting at a “geometrically-defined” point on the retina at 7 1/2 degrees of retinal angle. [… More»]
The above figure represents the trichromatic spectra corresponding to the three “classes of cones” that, in the “standard or historical model” are thought to represent the response of cone receptors on the retinal surface. I have referenced this oft-quoted figure elsewhere on the web page asserting (the red “X”) that short wavelength sensitive (”S” or blue sensitive) cones do not exist. In fact, it is my claim that no such thing as “classes of cones” exist. [… More»]
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