This book is not intended to be used for diagnosis purposes.This Color Blindness book with Ishihara style plates for color perception vision testing perfect for Opticians, Optometrists, Ophthalmologists and eye doctors who want to test color vision deficiency in their patients with Monochromacy, Dichromacy, Protanopia, Deuteranopia, Protanomaly, Deuteranomaly, Tritanopia. Also perfect for science teachers and parents to show children examples of color blindness.