Ishihara test

 
Pronunciation: /ɪʃɪˈhɑːrə/

noun

  • a test for colour blindness in which the subject is asked to distinguish numbers or pathways printed in coloured spots on a background of spots of a different colour or colours.

Origin:

early 20th century: named after Shinobu Ishihara (1879–1963), Japanese ophthalmologist