title: Retinal pigmentation and space perception: a failure to replicate.
mesh_terms: D003118:Color Perception; D003431:Cross-Cultural Comparison; D005869:Ghana; D006801:Humans; D012168:Retinal Pigments / Q000502:physiology*; D012606:Scotland; D013028:Space Perception / Q000502:physiology*
chemical_list: D012168:Retinal Pigments