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Jastrow illusion
The Jastrow illusion is an optical illusion attributed to the Polish-American psychologist Joseph Jastrow. This optical illusion is known under different names: Ring-Segment illusion, Jastrow illusion, Wundt area illusion or Wundt-Jastrow illusion.
The illusion also occurs in the real world. In the illustration, the two toy railway tracks are identical, although the lower one appears to be larger.
