Our human interface with reality


By Richard Epworth, ICL Technical Journal, November 1990, pages 384-411.
When we look at a screen, we are unaware of precisely where our eyes are looking, yet our eye movements contain valuable information. An opto-electronic system, which monitors our eye movements, may be used to communicate with a machine. Items on a screen may be selected simply by looking at them, and actions initiated by deliberate eye movements. Such a system can also be aware of our interests and difficulties, and may respond to our needs, even those of which we are unaware. This report describes the range of available techniques of eye movement measurement, possible applications of this information, and several practical demonstrations of an eye controlled interface.