Saturation and adaptation in the rod system.
D000221:Adaptation, Ocular; D003623:Dark Adaptation; D006801:Humans; D008027:Light; D008297:Male; D008959:Models, Neurological; D010775:Photic Stimulation; D010783:Photometry; D010786:Photoreceptor Cells / Q000502:physiology*; D012684:Sensory Thresholds; D013997:Time Factors