title: Filling-in of the foveal blue scotoma.
abstract: The blue-blindness (tritanopia) of the human foveola normally goes unnoticed but can be directly visualized by having observers view a flickering, monochromatic, short-wavelength field. The blue scotoma appears as a tiny dark spot in central vision, the visibility of which depends upon the wavelength of the field and the temporal frequency of modulation. Comparisons of fading times as a function of flicker frequency for the blue scotoma, foveal afterimages and optically stabilized images indicate a common time course, consistent with the hypothesis that perceptual filling-in of the foveal blue scotoma reflects the operation of neural processes similar to those involved in fading and regeneration of stabilized images.
authors.affiliation: Brain Research Unit, University of Freiburg, Hansastrasse 9, D-79104 Freiburg, Germany. svein.magnussen@psykologi.uio.no
authors.forename: S
authors.initials: S
authors.lastname: Magnussen
authors.forename: L
authors.initials: L
authors.lastname: Spillmann
authors.forename: F
authors.initials: F
authors.lastname: Stürzel
authors.forename: J S
authors.initials: JS
authors.lastname: Werner
mesh_terms: D000360:Afterimage / Q000502:physiology; D005425:Flicker Fusion; D006801:Humans; D009898:Optic Disk / Q000502:physiology*; D010466:Perceptual Closure / Q000502:physiology*