Visual sensitivity.
D000818:Animals; D001288:Attention / Q000502:physiology; D003623:Dark Adaptation; D003867:Depth Perception / Q000502:physiology; D004193:Discrimination Learning / Q000502:physiology; D004292:Dominance, Cerebral / Q000502:physiology; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D011601:Psychophysics; D012684:Sensory Thresholds; D014792:Visual Acuity; D014795:Visual Pathways / Q000502:physiology; D014796:Visual Perception / Q000502:physiology