Müller-Lyer illusion

Two sets of arrows that exhibit the Müller-Lyer optical illusion. The set on the bottom shows that all the arrows are of the same length.

Meaning

Noun

An optical illusion consisting of a stylized arrow whose midpoint appears to be closer to the tail end.

Origin

Devised by Franz Carl Müller-Lyer (1857–1916), a German sociologist, in 1889.

Modern English dictionary

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