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Ishihara colour charts in book form. The 24 test pictures facilitate confirmation of a red-green visual defect. Perfect for checking the sight of school-age children and adults.
Colour marks of different shades and sizes are arranged on the colour charts to represent numbers or letters. Patients with a red-green visual defect will be unable to see these letters or numbers. The colour charts will help the ophthalmologist to establish the presence and level of a red-green visual defect.