On the colour of the optic disc and its relation to various field defects.
D000328:Adult; D000368:Aged; D003116:Color; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009896:Optic Atrophy / Q000175:diagnosis*; D009902:Optic Neuritis / Q000175:diagnosis*; D014786:Vision Disorders / Q000175:diagnosis*; D058609:Visual Field Tests; D014794:Visual Fields