(via YouTube Sencogi)This video shows the algorithms which are working in the background in the "Augmented Reality Eyes" Android application. Seehttps://market.android.com/details?id=com.xminds.sencogi.augrealeyes&feat...
Real-time gaze tracking on a Smartphone, WITHOUT the use of Infra-red projectors. These same algorithms can be used for 3D visual cueing.