It is a test that uses a series of plates (Ishihara plates) where numbers or letters are formed by dots of a given colour against a background of dots of varying degree of brightness and saturation.
ISHIHARA TEST FOR COLOR BLINDNESS: "Ishihara Test For Colour Blindness is a modification of the earlier colour vision test."
Cite this page: N., Sam M.S., "ISHIHARA TEST FOR COLOR BLINDNESS," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/ishihara-test-for-color-blindness/ (accessed March 21, 2023).
