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GF1256  Book Test Color Blind Ishihara 38 Plate Gf

Product: GF1256 Manufacturer: Graham Field Stock Item? No

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  • Ishihara Test Chart Books for Color Deficiency, 38 Plate Book. Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness of two types: total color blindness and red-green blindness, each in two forms, complete and incomplete. Infludes 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 book for ease of handling. Detailed instructions included.

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