ISHIHARA Test Chart Books for Color Deficiency (10 Plate) promo-MAICO100 firm pressure for high frequencies

firm pressure for high frequencies

Bleach-free

Keep kids healthy and help stop the spread of germs

Consisting of 1 demonstration plate and 9 test plates displaying circle

ISHIHARA Test Chart Books for Color Deficiency (10 Plate) promo-MAICO100 firm pressure for high frequencies(10 Plate) 4 symbols and 6 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