An image generation system for generating an image on a display screen. The image generation system includes an eye-tracking system capable of determining a user's eye orientation and outputting a signal indicative of same. The image generation system also includes a bio-feedback sensor capable of detecting activity of one or more physiological functions of the user and outputting a signal indicative of the level of activity. A processor is included and is adapted to receive and process the output signals from the eye-tracking system and bio-feedback sensor. The processor determines an image to be generated on the display screen indicative of the signals from the eye-tracking system and bio-feedback sensor.