38 Plates Optometry Color Blindness Test Book Store ground mat x1

ground mat x1

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allowing pressure changes to be observed both internally and externally for greater safety and securityAir compressorSize(L*W*H) 39*24*26 cm (16*10*11 inch)Air Flow 72Liter/minPower 480WVoltage 110VAC/220VAC±10%Weight 18KGSufficient power

38 Plates Optometry Color Blindness Test Book Store ground mat x1Color Blindness Test Book Description A professional test book, which is a simple and accurate method for discovering congenital color blindness and red green blindness, each in two forms, complete and incomplete. It 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 with red and green. Color