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Product Details
✓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.