Optical illusions have fascinated people for centuries, challenging the brain and eyes to work together in decoding hidden patterns. In our today's optical illusion, a sea of "20s" cleverly hides a ...

Optical illusions often go viral, but they've been around long before social media. Here are 10 historical illusions that still leave people puzzled.

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 ...

There’s nothing like a pleasant brain tickle to experience a wide array of logic-defying optical illusions. These optical illusions in particular are seemingly set at a max difficulty level too. It’s ...

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 the Ebbinghaus illusion, a classic example of how context can shape what we ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception. By Katrina Miller Take a look at this video of a waiting ...

In this Ebbinghaus illusion of relative size perception, the orange circle on the left looks bigger than the one on the right - but it is actually 10 per cent smaller. In a new study, medical imaging ...

Chances are you’ve encountered some version of the “Ebbinghaus illusion,” in which a central circle appears to be smaller when encircled by larger circles and seems larger when surrounded by smaller ...

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 ...

How optical illusions work has been long-debated among scientists and philosophers, who wonder whether these illusions stem from neural processing in the eye or involve higher-level cognitive ...