Table 1.

Experience with three head-mounted displays for use in orthopedic training

	HMD Type
	ODG R7 glasses ×3	Google Glass X ×3	Vuzix M300 glasses ×3
Pros	– Easiest interface to use and set up (touchpad with mouse, finger remote, head gestures)	- Lightweight, unobstrusive	- Lightweight, easy to set up with wifi network because Android based.
			- Multiple software applications to use, and can communicate with other android devices.
	- While FOV is obscured, it is transparent.
Cons	- Camera field of view is slightly off from human field of view. Need to have glasses sit tilted downwards for view to overlap.	- Cannot set up on protected hospital network - Interface is least intuitive to use.	- Opaque viewfinder, so blocks field of vision.
			- Uniocular (some dizziness with testing)
			- Camera field of view difficult to line up with viewer field of view.
	- Heavy with entire field of view affected