An optical illusion is a puzzle in which the image in front of you possesses a different perception. These illusions are given in different forms, like puzzles, crossing numbers, hidden items, jumbled ...

Optical Illusion Challenge: Optical illusions are incredibly good at deceiving our eyes and minds. Researchers use optical illusions to examine how different brain regions process optical illusions.

Expand the image above to fill your screen and stare at the black blob in the center. (You can also find the original version here.) Most people perceive the blob as ...

An optical illusion has gone viral because of the way it uses a clever brain trick to dilate your pupils, but it doesn't work on everyone - are you immune to it? The illusion plays a trick on your ...