MacKenzie, I. S. (2012). Evaluating eye tracking systems for computer input. In Majaranta, P., Aoki, H., Donegan, M., Hansen, D. W., Hansen, J. P., Hyrskykari, A., & Räihä, K.-J. (Eds.). Gaze interaction and applications of eye tracking: Advances in assistive technologies, pp. 205-225. Hershey, PA: IGI Global. [software] I. Scott MacKenzie Dept. of Computer Science and Engineering York University Toronto, Canada M3J 1P3 [email protected] 1 INTRODUCTION The eye is a perceptual organ. In the norm...