Glossary

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Eye tracking(also: Gaze tracking, Eye-gaze tracking, Eye Tracker)

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…

Eye-Gaze Control(also: Gaze Control, Eye-Controlled Interface, Gaze-Based Input)

An input method that uses eye-tracking technology to detect where a user is looking and translates gaze direction into control commands for computers, wheelchairs, communication devices, and other systems. Eye-gaze control is essential for people with severe motor disabilities —…

Eye-Gaze in Sign Language(also: Eye Gaze, Gaze Direction)

The use of eye direction and movement as a grammatical and communicative feature in sign languages. In American Sign Language and other sign languages, eye-gaze serves multiple linguistic functions including indicating the location of referents in signing space, marking…

Eye-Hand Coordination(also: Hand-Eye Coordination, Visuomotor Coordination, Oculomotor Coordination)

The ability to coordinate visual input with hand movements to perform tasks requiring precision, such as reaching for objects, writing, typing, or using tools. Eye-hand coordination involves the integration of visual perception, spatial awareness, and motor control. Deficits in…

EyeDraw(also: Eye Draw)

A software application developed at the University of Oregon that enables people with severe motor impairments, particularly children, to create freehand drawings using eye movements tracked by an eye tracker. EyeDraw uses a two-state interaction model where users alternate…

EyeMusic

A visual-to-auditory sensory substitution device that converts images into sound, enabling people who are blind to perceive visual information including shape, location, and color. EyeMusic uses a left-to-right sweep algorithm where horizontal position maps to time, vertical…

Eyelid Gesture(also: Eyelid Interaction, Eyelid-Based Input)

An eyelid gesture is a deliberate eye movement used as an input method for controlling digital devices, involving intentional opening and closing of one or both eyelids in specific patterns, sequences, and durations. Unlike simple blink detection, eyelid gestures exploit the…

Eyes-Free Interaction(also: Eyes-Free Computing)

Interaction with digital devices and interfaces without requiring visual attention to a screen. Eyes-free interaction is essential for blind users but also benefits sighted users in contexts where looking at a screen is unsafe (driving), impractical (exercising), or socially…

Eyes-Free Interaction(also: Eyes-Free, Eyes-Free Gaming, Eyes-Free Interface)

Eyes-free interaction refers to the use of digital systems and interfaces without relying on visual output, using alternative modalities such as audio, haptic feedback, or speech. In gaming contexts, eyes-free games use 3D spatial audio, sound cues, and non-visual feedback to…

Eyes-free Interaction(also: Eyes-free Input, Nonvisual Interaction, Eyes-free Interface)

Interaction techniques that allow users to operate devices without looking at the screen or interface. Eyes-free interaction is essential for people who are blind, but also benefits sighted users in contexts where visual attention is unavailable or dangerous, such as while…

Eyes-free interaction(also: Eyes-free interface, Non-visual interaction)

An interaction paradigm in which users operate technology without relying on visual feedback, instead receiving information through auditory, haptic, or other non-visual channels. Eyes-free interfaces are essential for people who are blind or have low vision, but also benefit…