It's not just humans who notice optical illusions; certain animals do too, and they often use it to their advantage.

The illusion makes clever use of colour theory, demonstrating how our brains perceive colours differently against certain ...

Do animals see illusions like we do? A study tests guppies and doves to find out how different species process visual tricks.

Have you ever looked at two circles of exactly the same size and sworn one was larger? If so, your eyes have been tricked by ...

An all-new viral optical illusion on Reddit has left hundreds of people scratching their heads. At first glance, you will see ...

Test your Matrix-Level Vision with this village scene optical illusion. Only 1% can find all hidden hearts within 9 seconds.

In a new optical illusion, dots appear purple in central vision but blue in peripheral vision. Here's how it works.

A new study reveals guppies are easily tricked by optical illusions, while ring doves see clearly, highlighting differences ...

For most of us, these illusions are harmless. But my new research, published in Perception, suggests people with visual snow ...

A new Halloween-themed optical illusion has gone viral on Reddit, forcing players to sharpen their observation skills.

Test your sharp vision with a tricky optical illusion. Find the hidden inverted '68' within a grid of inverted '89s'. You ...