An optical illusion is a visual phenomenon in which our perception of an image differs from objective reality. This image is ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

An optical illusion is a fascinating visual phenomenon where the brain perceives an image differently from reality. These illusions play tricks on our eyes, making objects appear distorted, moving, or ...

Perception researchers have discovered many illusions where context affects perceived size and distance. A great example of this is the Ponzo illusion (reviewed in an earlier blog post). The Ponzo ...