Evidence for the equivalent-background hypothesis in cones.
D003623:Dark Adaptation; D006801:Humans; D008297:Male; D010786:Photoreceptor Cells / Q000502:physiology*; D012168:Retinal Pigments / Q000502:physiology; D012684:Sensory Thresholds / Q000502:physiology; D013997:Time Factors
D012168:Retinal Pigments