Pseudo-Isochromatic Plates frequently are used by eye specialists to get an idea of one’s color efficiency or deficiency. To a color-deficient person, all the dots in one or more of the plates will appear similar or the same—"isochromatic." To a person without a color deficiency, some of the dots will appear dissimilar enough from the other dots to form a distinct figure (number) on each of the plates—"pseudo-isochromatic."

Click the button below to begin the test, which consists of twelve different plates. Try to determine what number is encompassed within each plate; then fill in the blank with the correct answer. Afterwards, you will get to see your score, along with the correct answers. Some of the numbers are difficult to see, even for people with normal color vision. Just do your best!

Take the color test »