Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual sold2025 There is an opening at

There is an opening at the back of each sign holder for easy paper insertion

allowing you to easily carry more 3d doodler pen refills

please use Macbooksbundled software Photo Booth or Quick Time Player directly

Fully Vented for Better Heat Dissipation

Ishihara Colour Vision Test Book for Color Deficiency 24 Plates with User Manual sold2025 There is an opening atIshihara 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.