Check this out, an eye tracking device...

[FalconC45]

My mother forwarded this to me, thought it'll be cool for me to have since I'm disabled. Reminds me of the TRACK IR system...

 

http://www.nbcnews.com/technology/gadgetbox/peep-eye-tracking-capabilities-could-be-added-nearly-any-computer-1B7832679

 

Falcon

[+JediMaster]

Yeah, they're making pretty good strides in that area. Still likely too expensive and too finicky, but I'm sure within this decade it will be practical.