Ishihara Test for Color Blindness
What numbers do you see revealed in the patterns of dots below?
Normal Color Vision		Red-Green Color Blind
	Left	Right		Left	Right
Top	25	29	Top	25	Spots
Middle	45	56	Middle	Spots	56
Bottom	6	8	Bottom	Spots	Spots
Another interesting color blindness test is below
		The test to the left is simpler. The individual with normal color vision will see a 5 revealed in the dot pattern. An individual with Red/Green (the most common) color blindness will see a 2 revealed in the dots.