Speed and Accuracy of Gaze Gestures

Some of the biggest challenges in gaze interaction are calibration and accuracy. Calibration problems often occur if the user shifts position during the interaction or if the initial calibration has been done poorly. Even when calibration works for most of the screen, problems may still occur near the edges of the screen, especially at the bottom of the screen. With some eye trackers, the calibration becomes less accurate during the use, and the user has to recalibrate the eye tracker (Hansen et al., 2008). Drewes and Schmidt (2007) claimed that the use of gaze gestures would solve these problems, since gaze gestures can be used without any calibration if designed properly.