Ishihara Test Chart Books for Color Deficiency 24 Plates

Ishihara's Color perception test charts are recognized internationally as highly reliable method of determining color deficiency. With normal color perception, the images and numbers will all be visible. Each color test plate in this hard bound. Book is specially printed to measure incrementally higher color sensitivity and specificatiy. Popular and efficient test for red/green color vision deficiency quickly differentiates between congenital and aquired defects.