Ishihara Colour Vision Test Book for Color Deficiency 38 Plates with User Manual

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Ishihara Colour Vision Test Book for Color Features

• individuals with color vision defect should see a different figure from individuals with normal color vision.

• Makes use of the peculiarity that in red-green blindness, blue and yellow appear remarkably bright compared with red and green

• Diagnostic plates: intended to determine the type of color vision defect

• Diagnostic Plates: Intended To Determine The Type Of Color Vision Defect

About Ishihara Colour Vision Test Book For Color

The test consists of a number of coloured plates, called ishihara test plates, each of which contains a circle of dots appearing randomized in colour and size. Within the pattern are dots which form a number or shape clearly visible to those with normal colouur vision, and invisible, or difficult to see, to those with a red-green colour 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, 24 plates.