Rod-cone interaction on large and small backgrounds.
D003623:Dark Adaptation; D006801:Humans; D008027:Light; D008297:Male; D010783:Photometry; D010786:Photoreceptor Cells / Q000502:physiology*; D012684:Sensory Thresholds / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*