Ishihara Test For Color Blindness

 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 6 Top 25 Spots
Middle 45 29 Middle Spots Spots
Bottom 8 56 Bottom Spots 56

Another interesting color blindness test is below


The person with normal color vision will see a 5 revealed in the dot pattern.
A person with Red/Green (the most common) color blindness will see a 2 revealed in the dots.

 
The above information and references were obtained from the Test for  Color Blindness web page at http://www.toledo-bend.com/colorblind/ishihara.html