38 Plates Optometry Color Blindness Test Book Store so it is a must

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38 Plates Optometry Color Blindness Test Book Store so it is a mustColor Blindness Test Book Description A professional test book, which is a simple and accurate method for discovering congenital color blindness and red green blindness, each in two forms, complete and incomplete. It 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