Filling-in of the foveal blue scotoma.
- Author(s): Magnussen, S
- Spillmann, L
- Stürzel, F
- Werner, JS
- et al.
Published Web Locationhttps://doi.org/10.1016/s0042-6989(01)00178-x
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.