Scotopic vision in colour-blinds.
Alleles causing colour-blindness are present in humans at non-negligible levels, and it is not yet understood how colour-blindness is maintained, since colour-vision probably provides a selective advantage, e.g. when foraging. We show that after dark-adaptation colour-blinds had lower light perception thresholds than colour-normals (0.44 log-units), which may give a selective advantage under scotopic conditions, which may offset the disadvantage that colour-blinds suffer during foraging.
Verhulst
S
S
Zoological Laboratory, University of Groningen, Haren, The Netherlands. s.verhulst@biol.rug.nl
Maes
F W
FW
D003117:Color Vision Defects / Q000503:physiopathology*; D003623:Dark Adaptation; D005260:Female; D006801:Humans; D008297:Male; D012684:Sensory Thresholds / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*