Ishihara Color Vision Test Book Ishihara Color Vision Test Book For Color Deficiency 38 Plates With Occluder ISHIHARA BOOK FOR COLOR DEFICIENCY DIAGNOSISIshihara 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. SPECIFICATIONS· Book is specially printed to measure incrementally higher color sensitivity and specificity.· Ishihara Colour perception test charts are recognized internationally as highly reliable method of determining colour deficiency. With normal colour perception, the images and numbers will all be visible. Each colour test plate in this hard bound.· Ishihara Book for Colour Blindness, 38 Plates Edition:-· Popular and efficient test for red/green color vision deficiency