ISHIHARA Test Chart Books for Color Deficiency (24 Plate) 5-off-10 (9" x 14") Snellen optotype

(9" x 14") Snellen optotype chart for vision testing at 20 feet

Perfect to share with students and staff

Full frequency range for pure tone testing

Blood pressure and pulse rate are automatically measured by the oscillometer method

Ages newborn to 12 months

ISHIHARA Test Chart Books for Color Deficiency (24 Plate) 5-off-10 (9" x 14") Snellen optotype(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