Flicker masking in spatial vision.
D000360:Afterimage / Q000502:physiology; D005425:Flicker Fusion / Q000502:physiology*; D006801:Humans; D011930:Reaction Time / Q000502:physiology; D012684:Sensory Thresholds / Q000502:physiology; D013028:Space Perception / Q000502:physiology*