An old illusion and a new theory of stereoscopic depth perception.
D003867:Depth Perception / Q000502:physiology*; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008954:Models, Biological; D009903:Optical Illusions / Q000502:physiology*; D014785:Vision, Ocular / Q000502:physiology*