Ishihara Test for Color Blindness

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

I am color blind, as is about 12 - 20 percent (depending on whose figures you want to believe) of the white, male population and a tiny fraction of the female population. Most of these circles are nothing but spots to me. Below are the correct answers to what a person with normal color vision would see - and what I see (and most people with Red-Green color blindness). When you see what we can't see, you may understand why it's so tough to find the right sox and why we like bright colors, which are often identifiable.

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.
Another series of color vision tests can be found
on a webpage written by
Terrace L. Waggoner, O.D., Staff Naval Hospital Pensacola at http://members.aol.com/protanope/colorblindtest.html

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