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 (Δs/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.
© 1985 Optical Society of America
Joy Hirsch, "Comment on “Line-separation discrimination curve in the human fovea: smooth or segmented?”," J. Opt. Soc. Am. A 2, 477-478 (1985)