Ishihara plate
English
Etymology
Designed by Dr. Shinobu Ishihara at the University of Tokyo, who first published his tests in 1917.
Noun
Ishihara plate (plural Ishihara plates)
- Any of a set of coloured plates each containing a pattern of dots of various colours and sizes, forming a number or shape clearly visible to those with normal colour vision; used in testing for colour-blindness.