Ishihara Colour Blindness Test Book

Colour Vision Chart Ishihara Book 38 plate

Ishihara Test Chart Books for Colour Deficiency are accepted by leading authorities as a simple and accurate method for discovering congenital colour

Colour blindness and red-green blindness, each in two forms, complete and incomplete.

Helps determines the kind and degree of defect in colour vision. Makes use of the peculiarity that in red-green blindness, blue and yellow appear remarkably bright compared with red and green.

• Consist of a number of coloured plates.
• On each plate is printed a circle made of many different sized dots of slightly different colours, spread in a random manner.
• Within the dot pattern, and differentiated only by colour, is a number.
• What, or even if, a number is visible indicates if and what form of colour blindness the viewer has.
• The full test consists of thirty-eight plates, but the existence of a deficiency may be clear after fewer plates such as using the more popular 24 plate test.
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• #GE0099 Ishihara Colour Blindness Test Book
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