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Perception of a border defined by rapidly reversing luminance contrast
1Department of Neurology and Neuroscience, Cornell University Medical College, New York, NY, USA.
Perceptual and Motor Skills
|June 1, 1997
Abstract:
We report a new visual illusion of a perceptual boundary visible between two contiguous regions of equal luminance when the intensity is modulated with a temporal frequency that is higher than the critical fusion rate. Measurements of the luminance threshold of the perceptual border with various slopes of the luminance gradient yielded a function suggestive of the range of ocular instability. These findings raise the possibility that this new border illusion may be influenced by involuntary ocular motion during fixation.