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 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 ...

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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 ...