Ishihara Test Chart Book for Color Deficiency 38 Plates Latest Edition with User Manual and One Eye OCCLUDER

38 Plate Book with Instruction Manual and 1 eye Occluders ( Occluder provided is Same as in Image 2 ) A simple and accurate method for discovering congenital color blindness and red-green blindness, each in two forms, complete and incomplete. Includes four special plates for tests to determine the kind and degree of defect in color vision. Makes use of the peculiarity that in red-green blindness, blue and yellow appear remarkably bright compared with red and green. Color plates encased in specially designed album-type books for ease of handling.