Ishihara Test Book - 24 Plate

1022002

SSS Australia Clearance

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Unlike the Ishihara patterns that may be found online and viewed on a computer monitor, this colour vision test is designed to produce accurate test results in determining colour blindness and the degree of colour blindness. Since colour reproduction may vary from computer monitor-to-computer monitor, the best and most accurate method of testing for colour blindness still comes from official Ishihara album-type books.
Although the full Ishihara test consists of 38 plates, usually the existence of a deficiency is obvious after a few plates.
The Ishihara Color Testing Book is accepted by leading authorities as a simple and accurate method for discovering congenital colour blindness and red-green blindness in both complete and incomplete forms. Also known as Protanomaly and Deuteranomaly, "red-weakness" and "green-weakness", respectively, are the two most common types of colour deficiency.
More comprehensive results can be obtained with the addition of more testing plates.


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