Ziggo Wheelchair Lightweight Folding 16 Blue On Sale Weight Capacity * Size: 16 Table Paper Select Ear:Left Ear helping to make minor 67035

Ziggo Wheelchair Lightweight Folding 16 Blue On Sale Weight Capacity * Size: 16 Table Paper Select Ear:Left Ear helping to make minor 67035 Weight Capacity * Size: 16 x 24 x 32 * 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