title: Theoretical issues in symmetry perception.
authors.affiliation: Smith-Kettlewell Eye Research Institute, San Francisco, CA 94115, USA.
authors.forename: C W
authors.initials: CW
authors.lastname: Tyler
mesh_terms: D006801:Humans; D010364:Pattern Recognition, Visual; D014793:Visual Cortex / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*