Eye-tracking sensor maker makes play for big time

By Helena Soderpalm STOCKHOLM (Reuters) - An accidental breakthrough in a Stockholm laboratory 15 years ago could reap a fortune for the engineers who made it - as long as they can win over some of the most demanding consumers: video gamers. Since John Elvesjo noticed a sensor tracking his eye movements in a lab experiment, the technology he developed with Henrik Eskilsson and Marten Skogo has helped disabled people use a computer by identifying where they are looking on the screen. Eskilsson sa