Evidence that line illusions originate in the central nervous system.
Polarized lenses were employed to present the components of four line illusions separately to each eye. The phenomena were perceived even when both images were disparately presented, leading to the conclusion that the effect originates in the central nervous system and does not require the retina.
D001921:Brain / Q000502:physiology*; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D009903:Optical Illusions / Q000502:physiology*; D010775:Photic Stimulation; D012160:Retina / Q000502:physiology