Ishihara plate

noun

Any of a set of colored plates each containing a pattern of dots of various colors and sizes, forming a number or shape clearly visible to those with normal color vision; used in testing for color blindness.

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Meanings

nounIshihara plate (plural Ishihara plates)

plural Ishihara plates

  1. Any of a set of colored plates each containing a pattern of dots of various colors and sizes, forming a number or shape clearly visible to those with normal color vision; used in testing for color blindness.

Origin

Designed by Dr. Shinobu Ishihara at the University of Tokyo, who first published his tests in 1917.

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Cite this entry
APA

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

MLA

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

Chicago

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

Source: Ishihara plate on Wiktionary, CC BY-SA 4.0.