1 in 10 men has some degree of color blindness. It is much
less prevalent in women. But it's fun to take the tests anyway! You
should pretty easily be able to see the number 10 in the image above,
and for the image below, you'll see a different number. Of course, this
could also mean that your monitor just sucks, but if you can't read
the number, you may want to either adjust your monitor or go see an
eye doctor!
Color blindness is also referred to as "vision deficiency". Most of the time, it is genetic, but some people can become colorblind with trauma to the brain or through other ways.
Want to learn a little more about what causes color blindness? (or just scroll down for more examples) You have to examine the eye in order to learn more. As you may know, the eye has both rods and cones that are sensitive to light. For the cones, which is what you use when it is normal lighting conditions (daylight) there are three types, each of which has a different color hue that it responds to. It does this because it is sensitive to different wavelenghts of the light. It's not RGB (red green blue) but it's more blue, yellow/green and yellow. Each of these colors correspondes with the different wavelenghts.
Still with me? Okay, so basically when someone is partially colorblind, it could be because only one of the three types of cells is not as sensitive as it should be in that area.
Great, time for mre fun. Here are a couple more. NOTE: If your monitor colors aren't perfect, or if you have a LCD Monitor that is set to more contrast, these won't show up perfectly. Also, it goes without saying that these color blindness tests are no substitute for a visit to your eye doctor.
Wow, when we turn it to just black and white, it just goes away!
Although in the black and white version, you might be able to slightly see an outline of the numbers, so perhaps we could adjust this one a little bit for the future.
Also, keep in mind that most people who are colorblind do not see in Black and White! They still see in colors. If you know someone who is colorblind, talk to them about their day to day difficulties. For instance, if a webpage doesn't have underlined links, but they are a different color, it makes it harder. Or if they are looking at stoplights in the distance, it's hard to tell red from green. Think of how much more alert they would have to be as a driver. Thanks for listening to my discussion on color blindness. Class dismissed!
Please rate this illusion/picture. Your ratings help us choose which new optical illusions to create:
Best of the Best ...
Most Popular for October 2009:
Same Shade Diamonds Our newest optical illusion.
We just created it on 10/10/2009
Wow! It will look like the diamonds on the top are much darker than the diamonds on the bottom.
You won't believe how amazing this incredible optical illusion is.
Watch as the scary faces disappear before your eyes.
The longer you stare the stronger the illusion. Perfect to send to your friends for Halloween!
The Obama Illusion
We made this original Barack Obama Illusion and then we made it famous!
Stare for about 30 seconds and you'll see his ghostly image appear on the wall!
Valentines Day Love Test Illusion
This is one of our most highly rated illusions by our visitors. Watch the hearts disappear before your very eyes!
This is really cool. You'll start to see the hearts disappear as you fixate at the center. Don't miss it.
Moving Spiral Illusion
A version of our original moving spiral illusion was recently published in a popular college textbook.
It uses multiple illusory principles to give the illusion that it is moving when it is absolutely not moving. Big enough to be your desktop background!
Build Your Own Impossible Triangle
Instructions so you can build your own impossible triangle. Tell M.C. Escher that it's not so impossible after all!
Comes with a printable PDF guide with dotted lines for the folds and clearly marked lines to cut. See pictures of visitors submitted triangles too!
If you don't have time to see the hundreds of illusions today, see if you can at least catch all of these...
