3M™ Surgical Clipper Charger with Cord, US/Japan Plug, 3 hr Recharge Time, 1 Case Connection Tubing Accepted by leading authorities as Toilet Seat Covers Style:Left Ear 005 KG Width 8 7304134

3M™ Surgical Clipper Charger with Cord, US Japan Plug, 3 hr Recharge Time, 1 Case Connection Tubing Accepted by leading authorities as Toilet Seat Covers Style:Left Ear 005 KG Width 8 7304134 Accepted by leading authorities as 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 * Detailed instructions included surgical wounds