Contrast Sensitivity Testing Lets evaluate your contrast sensitivity Test one eye at a time. If you wear glasses or contact lenses wear them for the test Hold the screen about 40 cm or 15 inches away Try to identify square with different color. Close your Left Eye Which square is different? 1 2 3 4 Nothing Which square is different? 1 2 6 8 Nothing Which square is different? 2 7 8 11 Nothing Which square is different? 3 6 7 14 Nothing Which square is different? 8 11 12 24 Nothing HiddenNumberPoor Left Eye Average Left Eye Good Left Eye Close your Right Eye Which square is different? 1 2 3 4 Nothing Which square is different? 1 4 5 8 Nothing Which square is different? 2 9 10 13 Nothing Which square is different? 5 6 9 15 Nothing Which square is different? 7 8 9 13 Nothing HiddenNumberPoor Right Eye Average Right Eye Good Right Eye