411 REFERENCE · Wiktionary
Ishihara plate
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Designed by Dr. Shinobu Ishihara at the University of Tokyo, who first published his tests in 1917.
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.
Related terms
en Ishihara test
en eponyms terms borrowed from Japanese