Distorted Lines Illusion

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Disturted lines illusion
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Copyright © 1996-2017 Alexander Bogomolny

Distorted Lines Illusion

Circles on triangles do not appear quite round. Triangles on circles look concave. Similar to Poggendorff, Hering, Orbison, Zöllner illusions, the crossing lines distort the perception of the lines they cross.


  1. Ya. I. Perelman, Fun With Maths and Physics, Mir Publishers, Moscow, 1988 (ISBN 5-03-000025-9)
  2. A. Seckel, The Art Optical Illusions, Carlton Books, 2000 (#110)

|Contact| |Front page| |Contents| |Geometry|

Copyright © 1996-2017 Alexander Bogomolny


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