Ehrenstein illusion

noun

An optical illusion in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape.

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Meanings

nounEhrenstein illusion (plural Ehrenstein illusions)

plural Ehrenstein illusions

  1. An optical illusion in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape.

Origin

Studied by the German psychologist Walter Ehrenstein (1899–1961).

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Cite this entry
APA

Ehrenstein illusion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Ehrenstein%20illusion

MLA

“Ehrenstein illusion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Ehrenstein%20illusion. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Ehrenstein illusion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Ehrenstein%20illusion.

Source: Ehrenstein illusion on Wiktionary, CC BY-SA 4.0.