Hip Chair w/ Adjustable Footrest Jade Color Eye Charts-Illuminator Accepted by leading authorities as 1oz Tube Bx 12 Jobst Ultrasheer 20-30 Matern 305457 Style:Left Ear

Hip Chair w Adjustable Footrest Jade Color Eye Charts Illuminator 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 it is water resistant