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Hering Illusion
The Hering illusion was first discovered by German physiologist Ewald Hering in 1861. It shows how straight lines can appear to be bent in the presence of background lines.



"Hering Illusion" from The Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/HeringIllusion/
Contributed by: Rob Morris
Based on a program by: Margherita Barile
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