Color Vision: A New Understanding

John A. Medeiros


What Does a Color Vision Model Have to Explain?

Actually the three-cone model explains well almost nothing about how color vision works.  Explanations of color vision phenomena in terms of the three-cone model tend to be rather contrived and involve assumptions about the existence of improbably large pigment densities, or non-linear processes occurring in the cones or their subsequent processing circuitry in the retina or the brain.  A short list of what it does it not explain very well would include the following:

So, is that it?  Are we left with nothing, with no idea about how human color vision works?

Well, no.  The key is the cone shape.

Next: What About the Cone Shape?

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