Ishihara Color Vision Test Book – 24 Plate

Ishihara Colour Test Books

The Ishihara colour perception test for red-green color deficiencies.

The test consists of a number of colored plates containing 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 colour vision, and invisible, or difficult to see, to those with a red-green colour vision defect, or the other way around.