While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

Before jumping on in we have one question on our minds: what is an optical illusion? Optical illusions are visuals that tend to be deceptive to the eye and brain. This is based on numerous factors ...

Illusions like these mess with the brain's visual processing system, making viewers see things that aren't there in reality. | Credit: Eva Almqvist via Getty Images Optical illusions play tricks on ...

This Optical Illusion is viral on online puzzles among the top users who solve these types of brain illusions. These types of Optical illusions need to focus your attention with your Hawk-Eye Vision ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and were seen in caves. Nowadays they are found all over the place – on screens, in books and even in ...

Optical illusions are images or videos that be deceptive or misleading to our brains as a result of factors like colour, ...

Scroll down below to check these creepy photos of optical illusions out for yourself, and share your own stories in the comments! Discover more in 22 Times Optical Illusions Almost Gave People A Heart ...

If you can spot the 16 circles here, you’re spot on. A renowned optical illusion from the mid-2000’s is circulating on the internet once again, posing the challenge of finding each of the hidden round ...

This famous optical illusion is said to test the viewer’s relationship and reveal how they communicate with their partner. Le Baise (French for “The Kiss”) is a well-known artwork by Russo-Polish ...

Optical illusions occur naturally in different habitats and conditions across the world. Cloud formations can sometimes make it seem like there's an ocean or a UFO in the sky. Whether it is salt flats ...

The Museum of Illusions opens today in Philadelphia, near Independence Mall. The relatively small space — about 5,000 square feet — features optical and spatial illusions designed to disrupt your eyes ...

Optical illusions are great fun, and they fool virtually everyone. But have you ever wondered if you could train yourself to unsee these illusions? Our latest research suggests that you can. Optical ...