ISHIHARA Test Chart Books for Color Deficiency (24 Plate) 5-off-10 4 m (20/200 to 20/16

4 m (20/200 to 20/16 equivalent)

Perfect to share with students and staff

genetic-related information

Ages newborn to 12 months

Full frequency range for pure tone testing

ISHIHARA Test Chart Books for Color Deficiency (24 Plate) 5-off-10 4 m (20/200 to 20/16(24 Plate) 17 numbers and 7 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