ISHIHARA Test Chart Books for Color Deficiency (38 Plate) 5-off-10 hands-on text

hands-on text

including back of hands

Filter screen in bulb and valve to reduce dust buildup

With a reinforced frame and extended seat dimensions

ISHIHARA Test Chart Books for Color Deficiency (38 Plate) 5-off-10 hands-on text(38 Plate) 25 numbers and 13 trails Accepted by leading authorities as a simple and accurate method for discovering congenital color blindness of two types: total 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