He also did a youtube version of this on his Healthcare Triage channel: https://www.youtube.com/watch?...

So sorry to hear about this! I hope she recovers from it. I did a quick google search on this and found a few companies who are using eye tracking to communicate, generally using duration of eye gaze (and not blinking) to activate. Here are a few: http://www.tobii.com/en/assist... http://www.eyegaze.com/eye-tra... There may be others as well.

I was once told of a chemical company that named their servers after chemical names. Correspondingly, the ip address corresponded to the atomic number of the element. Thus, xxx.xxx.xxx.001 - Hydrogen xxx.xxx.xxx.002 - Helium etc.