Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual electronics3 pls kindly check the size

pls kindly check the size carefully before purchasing

which is compatible with Seagate Expansion 2TB/Backup Plus

black button

CE ROHS UL94V-0/94-2

Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual electronics3 pls kindly check the sizeIshihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual The test consists of a number of colored plates, called Ishihara test plates, each of which contains a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red green color vision defect, or the other way around.