Ishihara’s Colour Blindness Book 24 Plate

$195.00 Excl. GST

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

SKU: PAL22020 Category:

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.

Ishihara's Colour Blindness Book Brochure

User Manuals
Ishihara's Colour Blindness Book User Manual

Additional Information

Weight 0.2 kg
Dimensions 19 × 6 × 3 cm