Visual masking and the contrast-flash effect.
D003623:Dark Adaptation; D006801:Humans; D008027:Light; D008297:Male; D010470:Perceptual Masking / Q000502:physiology*; D010783:Photometry; D012684:Sensory Thresholds / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*