Tranquility® Premium OverNight™ Absorbent Underwear, Extra Large, 1 Case of 56 Plaster Splints Accepted by leading authorities as 1oz Tube Bx 12 Jobst Ultrasheer 20-30 Matern 305457 Style:Left Ear

Tranquility® Premium OverNight™ Absorbent Underwear, Extra Large, 1 Case of 56 Plaster Splints Accepted by leading authorities as 1oz Tube Bx 12 Jobst Ultrasheer 20 30 Matern 305457 Style:Left Ear 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 For persons 5' 4 and up * Length 10