Metacontrast and visual perception.
D000818:Animals; D002415:Cats; D003623:Dark Adaptation; D005133:Eye Movements; D005425:Flicker Fusion; D005556:Form Perception; D008027:Light; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D014796:Visual Perception