My own "cardboard" visor

With the need of having portable VR, even more: pocket-size portable VR viewer, I had to design a bunch of viewers. This is one of the ideas I'm working with right now. 3D printed and it works pretty neat. Historical facts: I found around 5 to 10 patents of "stereoscopes" that are dated from 1950 - 1960 - 1970 including the venerable "Viewmaster".