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Optical illusions in clinical dermatology: the Mach band phenomenon and afterimages
R F Wagner1, D L Shriner, K D Wagner
1Department of Dermatology, University of Texas Medical Branch, Galveston 77550.
Dermatology (Basel, Switzerland)
|January 11, 1992
Abstract:
A survey of dermatologists was conducted to determine whether the perceptions of afterimages and Mach bands impacted on clinical dermatology practice. 26.5% (13/49) of respondents indicated that they perceived one or both of these optical illusions. No false-positive potassium hydroxide interpretations of skin scrapings for hyphae were reported due to perceived afterimages, and no skin biopsies were reportedly performed as a result of Mach bands.