John Elvesjo

Eye tracking for communication. Elvesjö co-founded Tobii in Stockholm in 2001 after building an eye-tracking prototype as a student. Its devices let people who cannot speak or use their hands, such as those with motor neurone disease or cerebral palsy, select letters and symbols with their eyes and have a computer speak for them, through what became Tobii Dynavox. Calibration, cost and fatigue remain practical limits.