Optical illusions are so interesting because they demonstrate just how easily the brain can be tricked by patterns and repetition. This image appears simple, a grid neatly filled with the number 23 ...

Optical illusions come in all forms, from mind-melting artwork to photography trickery, but there's one style that never fails to perplex the internet – the humble colour illusion. Fooling the brain ...

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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.

A wolf optical illusion claims to reveal a lot about your personality based on whether you spot the head or tail first - but ...

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 ...

This is especially true for the Museum of Illusions New York, an interactive attraction in Manhattan’s West Village, where ...

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 ...

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 ...

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 ...

Last August Hinnerk Schulz-Hildebrandt noticed something strange while he was looking at a flight map on his phone. As his eye traced the plane’s flight path, he noticed that the line looked purple, ...