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.

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Optical Illusions are visual phenomena in which the perception of an image differs from its physical reality. ⁣ ⁣ Here are some of the most common optical illusions explained. SNL mocks Kristi Noem's ...

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 ...

For the first time, research shows that a certain kind of visual illusion, neon color spreading, works on mice. The study is also the first to combine the use of two investigative techniques called ...