title: Comment on "Line-separation discrimination curve in the human fovea: smooth or segmented"?
abstract: In a recent publication, Westheimer concluded that the foveal line-separation discrimination function was smooth [J. Opt. Soc. Am. A 1, 683-684 (1984)]. However, when the Westheimer data are replotted in the Weber-fraction (delta s/s) form, segments in the discrimination function similar to those previously described by Hirsch and Hylton [J. Opt. Soc. AM. 72, 1367-1374 (1984)] can be observed.
mesh_terms: D004192:Discrimination, Psychological / Q000502:physiology*; D005584:Fovea Centralis / Q000502:physiology*; D006801:Humans; D008266:Macula Lutea / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*