English Explanatory Dictionary

Ishihara test

English dictionary entry

Meanings

noun
  1. A test for red-green color blindness, using a number of colored plates (Ishihara plates), each of which contains a circle of dots of various colors and sizes. Depending on the person's vision, certain dots within the pattern will appear to form recognizable numbers or shapes.

Word forms

Ishihara test Ishihara tests

Etymology

Devised by Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917.

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