title: A visible difference.
authors.affiliation: Department of Psychology, University of Western Ontario, London, N6A 5C2, Canada.
authors.forename: M A
authors.initials: MA
authors.lastname: Goodale
mesh_terms: D000818:Animals; D006801:Humans; D014795:Visual Pathways / Q000033:anatomy & histology / Q000502:physiology*