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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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Fixation Duration(also: Fixation Time, Gaze Duration)
The length of time the eye remains relatively still on a specific point in a visual display during reading or visual processing. In eye-tracking research, fixation duration is a key metric for measuring cognitive processing load and readability — shorter fixations are associated…
Fovea(also: 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 provides the clearest visual acuity, which is why people move their eyes to point the…

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