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.

Optical illusion challenges keep people engaged in a fun way. These viral puzzles, designed to trick the eyes, force the brain to look twice before spotting the hidden detail. That mix of difficulty ...

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Perception researchers have long known about the structural and functional features that differentiate our central vision from our peripheral vision. The central (or foveal) region of our retinas are ...

Designing small spaces can be a daunting task, but optical illusions provide an innovative way to make them appear larger and ...