Changes

VR HMDs have displays with large [[field of view]] that covers the entirety of the user's vision. Humans have about 120 degrees of binocular vision<ref>http://www.artinarch.com/vp05.html</ref>, the display of a VR device should comprise the entire vision range. A large FoV is important to create [[immersion]] for the wearer.

===Rotational Tracking===