title: Reflections on principal principles of reflections.
authors.forename: R L
authors.initials: RL
authors.lastname: Gregory
mesh_terms: D003867:Depth Perception; D004292:Dominance, Cerebral; D006801:Humans; D007092:Imagination; D009903:Optical Illusions; D009949:Orientation; D011601:Psychophysics; D014796:Visual Perception