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Ishihara Book - 38 Plate

ITEM: #61-1256

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Simple and accurate method for discovering congenital color blindness and red-green blindness, each in two forms, complete and incomplete. Makes use of the peculiarity that in red-green blindness, blue and yellow appear remarkably bright compared with red and green.

Includes four special plates for tests to determine the kind and degree of defect in color vision
Color plates encased in specially designed album-type books for ease of handling

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