| Ishihara, Shinobu | <person> Japanese ophthalmologist, 1879-1963. See: Ishihara test. (05 Mar 2000) |
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| Ishihara test | <ophthalmology> A test for colour vision deficiency that utilises a series of pseudoisochromatic plates on which numbers or letters are printed in dots of primary colours surrounded by dots of other colours; the figures are discernable by individuals with normal colour vision. (05 Mar 2000) |