A spiral pattern hides a five-digit number, but many people spot only a few digits. Can you find the full sequence?

Optical illusion puzzles are very entertaining and puzzling as they are enjoyable, unexpected, and most of the time you cannot figure out how your eyes were able to deceive you that much. These brain ...

Optical illusions have a funny way of tricking our brains and eyes into believing what they see first, based on their ...

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

A head-scratching optical illusion challenges the perception of color and how the brain plays tricks on us. In an image created by the UK contact lens vendor Lenstore, a series of lilac letters ...

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.

Illusions like these mess with the brain's visual processing system, making viewers see things that aren't there in reality. | Credit: Eva Almqvist via Getty Images Optical illusions play tricks on ...

The optical illusion seen above makes the viewer feel as if they are falling into an expanding hole – and now we have a good explanation for why this happens. To investigate whether the expanding hole ...

Can you see through the camel-flage? Another day another wildlife safari for the eyes: In this animal-based optical illusion, viewers are challenged to spot the camel within the spectrum of colors.

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 ...