The brain’s perceptual systems are very easily fooled. You’re probably already familiar with the Thatcher Effect (where oddities that are very noticeable can’t be detected when the face is upside down) and the McGurk-MacDonald Effect (we hear with our eyes).
The Flashed Face Distortion Effect, noticed by Tangen, Murphy, and Thompson, shows that you can’t trust your peripheral vision either:
Next time you’re out in a nightclub, maybe take a proper look before writing the place off.