Eye movement entropy: Application of information entropy in eye-tracker

Abstract: To quantify the gaze movement visualization patterns, researchers have begun using eye movement entropy for a holistic estimation of information search patterns during tasks. Eye movement entropy, an eye movement metric derived from information entropy, is an effective measure for improving understanding of individuals’ gaze control behavior. Its core metrics include gaze fixation entropy and heatmap entropy, which have been widely applied and further validated in fields such as mental health, driving safety, aviation safety, education, product design, and industrial safety. Future research should focus on enhancing the robustness and ecological validity of eye movement entropy measurements, as well as continuously improving the measurement system of eye movement entropy.