title: Two components to visible persistence: effects of orientation and contrast.
mesh_terms: D000360:Afterimage / Q000502:physiology; D006801:Humans; D012399:Rotation; D012684:Sensory Thresholds / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D013997:Time Factors; D014792:Visual Acuity