Orientation illusion and masking in central and peripheral vision.
D004056:Differential Threshold; D005366:Figural Aftereffect; D005556:Form Perception; D006801:Humans; D007088:Illusions; D009433:Neural Inhibition; D009799:Ocular Physiological Phenomena; D009949:Orientation; D010469:Perceptual Distortion; D010470:Perceptual Masking; D014794:Visual Fields; D014795:Visual Pathways / Q000502:physiology; D014796:Visual Perception