I programmed a video game for autistic children for a research project. I’m just posting this now because it’s still relevant to what I’m doing now.
I used C# protocols in the Unity3D game engine to achieve this. This was my first time ever working with eye-gaze, and I used it as a control mechanism to power a behavior correction application.
[Future] Seeing the technology and research grow behind gaze-monitoring, I’d be interesting in seeing an eye-gaze tracker which can say something about your state-of-being. Control is cool. Monitoring is a whole other thing.