A mind-bending optical illusion featuring two squares that look completely different in shade but are actually identical has left internet users scratching their heads. The puzzling image has viewers ...

Optical illusions are designed in such a manner that they serve more than an entertainment source. These puzzles are also ...

Optical illusions that hide words and objects in plain sight are great for testing your visual acuity, attention to detail, ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Andriy Onufriyenko via Getty Images Though optical illusions come in all shapes and ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception. By Katrina Miller Take a look at this video of a waiting ...

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism which appear to change shape when viewed from three different directions. Those are the top ...

Allen Institute researcher Jerome Lecoq points to one of the diagrams that was used in a study focusing on how the brain interprets optical illusions. (Allen Institute Photo / Erik Dinnel) Our brains ...

Researchers used lasers to record and stimulate the activity of neurons in mice in order to learn how the brain processes and interprets optical illusions. (Allen Institute) Jo Kavaliauskas once saw ...

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism that appears to change shape when... Optical illusions are a brain feature, not a bug. Here's ...