Optical illusions (sometimes called also visual illusions) are cool images perceived in a manner that differs from objective reality. What the human eye sees is interpreted by the brain in a way that contradicts physical measurement of the source image.

You can find several types of cool optical illusions on this site all sorted into detailed categories located below and in menu on the right side as well. They are suitable not only for adults but also for kids.


Illusion of the Day

This video will blow your mind. It includes great real life applications of illusions that will trick your eyes.


Warm Up Your Brain

Can you find all 5 Y's in this picture?
I assure you that they are there. Take a closer look.

Hidden Letters


Red Dot

Only a few people can see an image hidden in this eye test. If you don't see it at first, then relax, move back and forth. Give it some time. Once you see it, don't forget to challenge your friends.

Red Dot - Hidden Picture


Brick Wall Visual Illusion

Yet another cool picture that baffled Internet. It seems like a regular wall but there is something between the bricks and it's not a stone. Once you see it, it's hard to unsee it.
Hint: Smokers might have an advantage here.

Brick Wall Illusion


You may start with Face Illusions >>

If you like these brain teasers then feel free to share them with your friends.