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 ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Illusions like these mess ...

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 ...

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 ...

Sometimes things are not what they seem. They become poetic thanks to optical illusions. Have a look at this collection of ...

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 ...

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism that appears to change shape when... Optical illusions are a brain feature, not a bug. Here's ...

A brain-boggling optical illusion twists the faces of celebrities to make them appear contorted and alien-like. In a recent TikTok video, user @professoramx highlighted the trick, which requires you ...

There are lots of visual illusions: an old woman who turns into a young girl, a drawing that’s either a duck or a rabbit depending on how you look at it, and, need I mention the blue and black, or ...

Today I learned that scientists study optical illusions. I always thought they were just for fun. A team of psychologists studied variations of this “expanding hole” illusion to determine what effects ...