Orbison illusion
The Orbison illusion (or Orbison's illusion) is an optical illusion first described by American psychologist William Orbison (1912–1952){{cite book|last=Roeckelein|first=Jon E.|date=2006|title=Elsevier's Dictionary of Psychological Theories|url=https://books.google.com/books?id=1Yn6NZgxvssC&q=william+orbison+psychologist&pg=PA651|location=Amsterdam|publisher=Elsevier|page=651|isbn=9780444517500}} in 1939.
The illusion consists of a two dimensional figure, such as a circle or square, superimposed over a background of radial lines or concentric circles. The result is an optical illusion in which both the figure and the rectangle which contains it appear distorted; in particular, squares appear slightly bulged, circles appear elliptical, and the containing rectangle appears tilted.{{cite web|url=http://www.optical-illusions.info/illusions/Orbison_illusion.htm|title=Orbison illusion|website=opticalillusions.info|access-date=June 30, 2016|archive-url=https://web.archive.org/web/20161007173234/http://www.optical-illusions.info/illusions/Orbison_illusion.htm|archive-date=October 7, 2016|url-status=dead}}
References
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- {{cite book|last=Fineman|first=Mark|title=The Nature of Visual Illusion|publisher=Dover Publications|pages=[https://archive.org/details/natureofvisualil0000fine/page/152 152-153]|date=1996|isbn=0486291057|url=https://archive.org/details/natureofvisualil0000fine/page/152}}
- {{cite book|last=Robinson|first=J.O.|title=The Psychology of Visual Illusion|publisher=Dover Publications|pages=72–73|date=1998|isbn=978-0486404493}}
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