Glossary
Searchable terminology from accessibility, web standards, and related fields.
13 results found in Eye Tracking.
- Corneal Reflection (Pupil-Center Corneal Reflection, PCCR)
- An eye tracking technique that works by shining a near-infrared light at the eye and measuring the relationship between the reflection off the cornea (the bright spot called the glint) and the center …
- Dwell Activation (Dwell Click, Dwell Selection)
- An input method where an action is triggered by maintaining focus on a target for a specified period of time (the dwell time). Commonly used with eye tracking and head tracking systems, dwell activati…
- Dwell-Based Selection (Dwell Selection, Dwell Time Selection)
- An interaction technique used in eye-gaze and head-tracking interfaces in which holding the cursor over a target for a fixed duration (the 'dwell time', typically 300-1000 ms) triggers a selection, re…
- Electrooculogram (EOG, Electrooculography)
- The electrooculogram (EOG) is a technique for measuring the electrical potential difference between the front and back of the eye using surface electrodes placed around the eyes. This corneal-retinal …
- Eye Cursor (Gaze Cursor)
- A visual indicator displayed on screen that shows where an eye tracking system has determined the user is currently looking. The eye cursor serves the same function as a mouse cursor but is controlled…
- EyeDraw (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…
- Fovea (Foveal Vision, Fovea Centralis)
- The small, central area of the retina responsible for sharp, detailed vision, covering approximately 1 degree of visual angle. The fovea contains the highest density of cone photoreceptors and provide…
- Gaze Reinstatement (Gaze Reinstatement Effect, Looking-at-Nothing Paradigm)
- Gaze reinstatement is the cognitive phenomenon in which a person mentally recalling or imagining a previously seen scene reproduces, on a blank or unrelated surface, eye movement patterns similar to t…
- Gazepoint (Gaze Point, Point of Gaze)
- The specific point on a screen or surface where a person is looking at any given moment, as determined by an eye tracking system. The gazepoint is calculated from the gaze vector — the line extending …
- Infant-Computer Interaction (Baby-Computer Interaction)
- The design and study of technology interfaces intended for use by infants, typically under 24 months of age. Infant-computer interaction presents unique challenges compared to other user populations b…
- Point-of-Gaze (POG, Gaze Point, Point of Regard)
- 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…
- Visual Evoked Potential (VEP, Visually Evoked Response, VERP)
- A visual evoked potential (VEP) is an electrical signal generated by the brain's visual cortex in response to a visual stimulus, typically a flash of light or a pattern change. VEPs are measured using…
- Zoom Interface (Zoom Screen, Zoomable User Interface, ZUI)
- A user interface technique that allows users to magnify a portion of the screen to increase the effective size of interface elements, making them easier to select with low-precision pointing devices s…