Bobby Moore presents an optical illusion quiz challenging viewers to identify the true spinning direction of a horse.

This optical illusion by artist Oleg Shupliak features a sketch of a woman, but there are actually four women hidden in plain sight – but good luck finding them all!

Our pick of the best optical illusions of all time will leave you amazed and confused in equal measure.

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.

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 ...

It’s like putting on ugly goggles. Puzzle lovers are getting the heebie-jeebies over this “freaky optical illusion,” which makes people’s faces look hideously distorted. A now-viral video detailing ...

Discover 22 photos that accidentally created optical illusions. See how timing and perspective turned ordinary moments into ...

Medical imaging experts are adept at solving common optical illusions, according to research from four UK universities, including the University of East Anglia. The correct analysis of medical images ...

Architects and artists have clever ways of confusing your eyes and creating optical illusions with their building designs.

Elon Musk is on top of the world after Twitter accepted his $44 billion buyout offer on Monday. But the Tesla founder, 50, appears upside down in a new optical illusion that highlights how easy it is ...

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. Credit: Getty Images ...