Evidence that the colored shadow effect is retinal.
Polarized lenses were employed to present the images of the colored shadows effect separately to each eye. The phenomenon was perceived only when both images were viewed on the same retina, leading to the conclusion that the effect is entirely retinal in origin and does not involve the central nervous system.
D002540:Cerebral Cortex / Q000502:physiology; D003118:Color Perception / Q000502:physiology*; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D009903:Optical Illusions / Q000502:physiology*; D010775:Photic Stimulation; D012160:Retina / Q000502:physiology*