A Novel Mechanism for Color Vision : Pupil Shape and Chromatic Aberration Can Provide Spectral Discrimination for “ Color Blind ” Organisms

The only known mechanism for color vision requires spectrally diverse photoreceptor types (1). However color vision typically comes at a cost: a reduction in signal to noise ratio in low light conditions and degraded angular resolution in each spectral channel. Coleoid cephalopods (octopus, squid, cuttlefish) have a single photoreceptor type (2,3,4) and… CONTINUE READING