An optical illusion is a visual phenomenon where our perception of an image differs from objective reality. This image is perceived as a geometric optical illusion. These optical illusions occur due ...

Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion. In the Ebbinghaus illusion, two identical circles placed side by side are each framed by a set ...

A new optical illusion on Reddit challenges viewers to find a well-camouflaged frog among pebbles and shrubs in just 10 seconds. Optical illusions are a great way to test your brain’s comprehension ...

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 ...

A new optical illusion is here, and it is a lot trickier than it looks. The image has a grid of 14 columns and 9 rows. The challenge is simple: spot the lone '400' hiding inside a grid packed with ...

From colour-changing fire trucks to 'The Dress', many optical illusions have baffled the internet over the years. Now, a scientist from Harvard Medical School has discovered an illusion that might be ...