Contrast and size variables and the tilt after-effect.
D000221:Adaptation, Ocular; D000818:Animals; D002415:Cats; D005366:Figural Aftereffect; D005403:Fixation, Ocular; D000882:Haplorhini; D006801:Humans; D008027:Light; D008959:Models, Neurological; D009949:Orientation; D012858:Size Perception; D014785:Vision, Ocular; D014793:Visual Cortex / Q000502:physiology