Vox contributor Joss Fong looked at the history and science behind Magic Eye stereogram images. The images were popular in the 1990s, but the history of the images goes back much earlier.
The images featured prominently in an episode of Seinfeld and in the movie Mallrats with clips from both appearing in the video.
The science behind the stereogram craze of the 1990s. You might have remembered when sterograms appeared on Seinfeld. Learn about how these images trick the brain.