This series of plates is designed to provide a test which gives a quick and accurate assessment of colour vision deficiency of congenital origin. This is the commonest form of colour vision disturbances.
The principle and basis for the test chart for colour deficiency are the quality of the colour and the colour arrangement, Testing for colour deficiency requires a high level of sensitivity and specificity. Ishihara's Test Chart has been used world wide because of its reliability and it is recognised for its high sensitivity and specificity in authorised ophthalmology textbooks.
Kanehara Trading Inc has been maintaining this quality and certifies the Test's reliability.
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