title: The relation of apparent brightness to contrast threshold on a photopic background: dependence on retinal position and target size.
mesh_terms: D004056:Differential Threshold; D006801:Humans; D008027:Light; D008959:Models, Neurological; D010783:Photometry; D012160:Retina / Q000502:physiology*; D014785:Vision, Ocular; D014794:Visual Fields