I apologies if this is not programming-related enough. To keep the non-programming part short: My cousin was just admitted into intensive care with Guillain Barre and is deteriorating. She will (likely) recover physically in a couple of months, but is suffering from extreme depression and panic attacks as she is essentially stuck in a shell of a body that she is losing control over. We may only have a couple more days that traditional methods of communication with her will be useful. My understanding is, however, that she will most likely remain in control of her eye muscles.
So the question is: does anyone know of a good gaze tracking library I can use with consumer hardware (I have a MacBook Pro on hand that I can put Windows or Linux on, and can acquire a selection of consumer to prosumer grade cameras) to build a very simple visual typing interface with?
Essentially so that she can look at a keyboard (fullscreen) and blink to click the key. Or something like that. It needs to be something she is already familiar with (QWERTY) as she is under a LOT of stress right now.
I'm really just trying to get a basic working demo so that I can convince her family that it works. Unfortunately, they are in denial as to just how bad she is going to get so I want to be ready.
Thanks for your help!