Differences in biological function between the blind and the sighted.
D001766:Blindness / Q000503:physiopathology*; D002940:Circadian Rhythm; D006801:Humans; D008550:Melatonin / Q000378:metabolism / Q000502:physiology; D010870:Pineal Gland / Q000378:metabolism / Q000503:physiopathology*
D008550:Melatonin