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.

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!

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 ...

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: Louis Albert Necker ...

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 ...

Optical illusions are interesting images that challenge our minds, inviting us to solve a puzzle and find what is hidden.And ...

Medical imaging experts are adept at solving common optical illusions, according to new research. The research is the first to show that people can be trained to do better at solving visual illusions, ...

Our brain and eyes can play tricks on us—not least when it comes to the expanding hole illusion. A new computational model developed by Flinders University experts helps to explain how cells in the ...

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 ...

A viral optical illusion test claims to reveal your current state of mind based on whether you see a shark or feet first.

The UI change is one of several subtle tweaks to Liquid Glass in iOS 27. The main improvement is a Liquid Glass slider within the Settings app that lets you adjust how clear or tinted you want the ...