Point-of-Gaze

Point-of-gaze is the location on a display, scene, or object at which a user's eye is currently fixating, typically reported by an eye tracker as a stream of (x, y) screen coordinates sampled at rates between 30 and several hundred hertz. Raw point-of-gaze data is noisy and contains saccades (rapid jumps), fixations (brief pauses), and smooth pursuits; accessibility systems that use gaze as input apply filtering and fixation-identification algorithms to produce stable 'gaze points' suitable for controlling a cursor or selecting a UI element. POG underpins gaze typing, gaze dwell-click, multimodal gaze-plus-switch control for users with motor disabilities, and gaze-contingent displays for low-vision accommodation.