ISHIHARA Test Chart Books for Color Deficiency (14 Plate) new-and-top-selling With 2 layers of paper

With 2 layers of paper and 1 layer of poly film

getting help from a trusted person

Clean the surface until all the visible powder is gone

This model features a deluxe stainless steel chest piece and stainless steel dual inner spring binaural that provides extra durability

Non-chill diaphragm

ISHIHARA Test Chart Books for Color Deficiency (14 Plate) new-and-top-selling With 2 layers of paper(14 Plate) 11 numbers and 3 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