Ishihara Test for Colour Deficiency - 24 Plate Edition

The Ishihara 24 plate Colour Test is a test for red-green colour deficiencies. It was named after its designer, Dr. Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917.

The test consists of a number of coloured plates, called Ishihara plates, each of which contain a circle of dots appearing randomized in colour and size. Within the pattern are dots which form a number or pattern visible to those with normal colour vision and invisible, or difficult to see, for those with a red-green colour vision defect.

  • Ishihara's Tests for Colour Deficiency, the official standard medical test for colour blindness
  • A quick and accurate assessment of congenital, the most common form, of colour blindness
  • Distinguish between total colour blindness and strong and mild forms of both protan and deutan deficiency
  • Quickly differentiates between congenital and aquired defects 
  • A brief guide to use and interpretation is provided

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