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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.
- ‘Testing of visual acuity and color vision (Ishihara tests) should be performed when EMB is to be used.’
- ‘These tests are sometimes known as the Ishihara test.’
- ‘Patients should have baseline visual acuity testing and testing of color discrimination (Ishihara tests).’
- ‘The latter was assessed in 12 534 children aged 11 years using the Ishihara test, 1 with CVD being the inability to identify all 24 plates.’
Early 20th century: named after Shinobu Ishihara (1879–1963), Japanese ophthalmologist.
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