Maddak Walker Bag, For Use With Walkers, Cotton, 1 Each 15 20 Pantyhose * A high quality porous 100% Detergents * A high quality porous 100% cotton tape at an affordable price 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 There are two pockets: One in the front one in the back