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==Virtual Reality HMDs==
Tracker --> CPU --> GPU --> Display --> Photons --> Optics
===Large Field of View===
VR HMDs have displays with large [[field of view]] (FOV) that comprise the entirety of the user's vision. With both eyes, humans have about 180 degrees FOV. The display of a VR device should cover as much of the vision range as possible. A large FoV is important to create [[immersion]] for the wearer.
