Hermann grid

noun

An optical illusion where ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background.

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Meanings

nounHermann grid (plural Hermann grids)

plural Hermann grids

  1. An optical illusion where ghostly grey blobs are perceived at the intersections of a light-coloured grid on a black background.

Origin

Named after German physiologist Ludimar Hermann (1870).

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Cite this entry
APA

Hermann grid. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Hermann%20grid

MLA

“Hermann grid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Hermann%20grid. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “Hermann grid,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Hermann%20grid.

Source: Hermann grid on Wiktionary, CC BY-SA 4.0.