The Sword of Damocles

Early pioneering tech from 1968 is a stereoscopic headmounted display created by Ivan Sutherland, the first Virtual Reality technology:

Computer graphics pioneer Ivan Sutherland models a stereoscopic display he created at Harvard using miniature TV tubes. An early application showed a three-dimensional wire-frame virtual room that users could explore by moving their heads.

I couldn’t locate a demonstration of the wireframe rooms (but if anyone knows … let me know!)

Images above are from the Computer History Museum here and here

Papers written by Ivan Sutherland from 1965 on the subject can be found here and here