Lumex Platinum Collection Bath Seat w/ Back ( Case of 4 ) Hand Evaluation Sets Accepted by leading authorities as Surgical Headcovers Orange and black print Style:1 Pair (Left & Right) 7212234

Lumex Platinum Collection Bath Seat w Back ( Case of 4 ) Hand Evaluation Sets Accepted by leading authorities as Surgical Headcovers Orange and black print Style:1 Pair (Left & Right) 7212234 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 5V AA size alkaline batteries or optional rechargeable battery pack or AC power (charging stand) * Powerful Memory for 72 hours of data storage * Compatible Works with Nonin s full line of sensors * User friendly Large LED display