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Ishihara’s Colour Blindness Book 24 Plate

$195.00 Excl. GST

Ishihara’s Colour Blindness Book 24 Plate – A series of coloured plates specifically designed to test for the presence of different colour vision defects.

SKU: PAL22020 Categories: ,
Product Description

Ishihara’s Colour Blindness Book 24 Plate

The test consists of a number of colored plates, called Ishihara plates, each of which contains a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red-green color vision defect, or the other way around. The full test consists of 38 plates, but the existence of a deficiency is usually clear after a few plates. There is also the smaller test consisting only 14 plates.

Transformation plates: individuals with color vision defect should see a different figure from individuals with normal color vision.

Vanishing plates: only individuals with normal color vision could recognize the figure.

Hidden digit plates: only individuals with color vision defect could recognize the figure.

Diagnostic plates: intended to determine the type of color vision defect (protanopia or deuteranopia) and the severity of it.

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Additional Information

Additional Information

Weight0.2 kg
Dimensions19 × 6 × 3 cm

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