Privacy Policy + T&C

We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. You also agree to our T&C.


Common Answers

Have you entered September's Common Answers?

BB Logo
More Than 2 Colours?


Previous Illusion

How many colours - only 2?

[Move your mouse over the bar below]

Print Illusion

Show Alternative View

Next Illusion

An optical illusion, or visual illusion is characterised by visually perceived images that differ from objective reality. What does this mean? Basically your eyes see one thing, and your brain 'sees' something else. The information that your eyes feed back to the brain has to be understood by the brain, and the brain is very clever at guessing what it should be seeing and sometimes this difference can be quite astounding.

Top 10 Illusions


Impossible triangle?


Black and white dots?


Are these cafe wall lines parallel?


A lovely vase?


Shadow illusion?


Level balance?


Same length red lines?


What Am I?


Spinning dancer


Purple Nurple



This website uses cookies, for more information please view our privacy policy. By using the site you also agree to our terms and conditions.