Brightness discrimination with a stabilised retinal image.
D000328:Adult; D003118:Color Perception; D004192:Discrimination, Psychological; D005260:Female; D006801:Humans; D008027:Light; D008266:Macula Lutea / Q000502:physiology; D008297:Male; D008875:Middle Aged; D012160:Retina / Q000502:physiology*; D058609:Visual Field Tests; D014794:Visual Fields