

It was Sir Charles Wheatstone who in 1833 first came up with the idea of presenting slightly different images to the two eyes using a device he called a reflecting mirror stereoscope. When viewed stereoscopically, he showed that the two images are combined in the brain to produce 3-D depth perception.
Source from
http://www.arts.rpi.edu/~ruiz/stereo_history/text/historystereog.html


















