Eye tracking

A technology that measures where a person is looking on a screen or in an environment by detecting eye position and movement, typically using infrared light and cameras. In accessibility, eye tracking serves dual roles: as an assistive input method allowing people with severe motor disabilities to control computers, communicate, and navigate interfaces using only their eyes; and as a research tool for understanding how people with visual, cognitive, or other disabilities interact with content. Eye tracking reveals fixation patterns, saccades (rapid eye movements between fixations), and scan paths that expose usability barriers and inform the design of more accessible interfaces. Commercial eye trackers range from specialized high-precision research devices to consumer webcam-based solutions.