Color Blindness

Color blindness is typically a genetic condition, and it is much more common in men than in women.
Approximately one in 12 men has at least some color perception problems. Red-green colorblindness is the most common one.
Less common, acquired deficiencies stem from injury, disease, or the aging process.
Also, although not called "color blindness," when people age, their corneas typically turn yellowish, severely hampering their ability to see violet and blue colors.

Many people think anyone labeled as "colorblind" only sees black and white -- like watching a black and white movie or television. This is a big misconception and not true. It is extremely rare to be totally color blind (monochromasy - complete absence of any color sensation). There are many different types and degrees of colorblindness - more correctly called color deficiencies.

Do a test

Most of the circles below are nothing but spots to people who are colorblind.
In the table you can find the correct answers to what a person with normal color vision would see - and what a person who is colorblind sees (and most people with Red-Green color blindness).
When you see what they can't see, you may understand why it's so tough to find the right sox and why they like bright colors, which are often identifiable.

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 the one below
This test is simple.
The individual with normal color vision will see a 5 revealed in the dot pattern.
An individual with Red/Green color blindness will see a 2 revealed in the dots.



There are different types of colorblindness.
At this site you can test what people who have Protan, Deutan or Tritan colorblindness see (or do not see): http://webexhibits.org
Another series of color vision tests can be found at http://colorvisiontesting.com
"The only thing worse than being blind is having sight but no vision"

© - Site Seeing - Sonny, Lotje, Laurette en Femke, The Netherlands 2006