Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Adaptive Optics(also: AO)
- A technology that measures and corrects optical distortions in real time, originally developed for astronomical telescopes and now applied in ophthalmology and vision science. Adaptive optics systems use a wavefront sensor to detect aberrations and a deformable mirror or other…
- Anomalous Trichromat(also: Anomalous Trichromacy, Colour Anomaly)
- A person who has all three types of cone cells in the retina but one type has a shifted spectral sensitivity, causing altered colour perception that is less severe than dichromacy. Anomalous trichromats include protanomalous individuals (shifted L-cones, reduced red…
- Artificial Eye(also: Eye Model, Optical Eye Model)
- A physical device constructed from optical components to simulate the optical properties of a human eye. Typically consisting of a lens, adjustable aperture (simulating the iris), and an image sensor (simulating the retina), artificial eyes are used in vision research to test…
- Astigmatism
- A common refractive error caused by an irregularly shaped cornea or lens, resulting in blurred or distorted vision at all distances. The cornea is shaped more like a rugby ball than a sphere, causing light to focus on multiple points rather than one. Astigmatism frequently…
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