Earlier, it was considered a miracle, if one said about someone where he was looking at, because of mercurial & mysterious nature of glance.  
But now the mystery of eyes can be unraveled by science. there is a system for detecting where you are looking and gazing at, not only your glance can be detected and but supports other applications as well including where people are facing, operating computer mouse by opening and closing eyes, and detecting people falling asleep while driving. The system also helps in detecting autism and other communication disabilities.