Peripheral visual thresholds and area summation.  Examined by kinetic perimetry in three night-blind subjects.
D000222:Adaptation, Physiological; D000293:Adolescent; D000328:Adult; D003624:Darkness; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D009755:Night Blindness; D014787:Vision Tests; D014796:Visual Perception