Now you see it, now you don't. Colour vision.
Studies of patients who are colour blind as a result of brain damage show that colour contributes much more to our perception of the visual world than merely the registration of hue.
Heywood
C
C
Department of Psychology, Science Laboratories, South Road, Durham DH1 3LE, UK.
Cowey
A
A
D003118:Color Perception / Q000502:physiology*; D003117:Color Vision Defects / Q000503:physiopathology; D006801:Humans; D014795:Visual Pathways / Q000502:physiology