ISHIHARA Test Chart Books for Color Deficiency (10 Plate) promo-MAICO100 The tunable diaphragm technology lets

The tunable diaphragm technology lets you hear different frequency sounds by simply adjusting the pressure on the chestpiece

firm pressure for high frequencies

Combines the savory taste of a cracker with delectable sweetness of honey

"NOT FOR USE ON SKIN" to ensure proper use

ISHIHARA Test Chart Books for Color Deficiency (10 Plate) promo-MAICO100 The tunable diaphragm technology lets(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