Ishihara Test for Color Blindness

What numbers do you see revealed in the patterns of dots below?



Normal Color Vision
Left Right
Top 25 29
Middle 45 56
Bottom 6 8

Red-Green Color Blind
Left Right
Top 25 Spots
Middle Spots 56
Bottom Spots Spots

Another interesting color blindness test is below
The test 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.

http://www.toledo-bend.com/colorblind/Ishihara.asp