Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Field of View(also: FoV, Viewing Angle)
- The angular extent of the observable world visible at any given moment. In the context of head-mounted displays like the HoloLens 2, the field of view refers to the area in which virtual content can be displayed, which is typically narrower than natural human vision. This…
- Fisheye View(also: Fisheye Lens, Graphical Fisheye)
- A focus+context visualization technique, introduced by Furnas, that magnifies a region of interest while progressively compressing surrounding context — analogous to a fisheye camera lens. Used in tree visualizations, menus, and graphs to help users see detail and structure…
- Focus+Context(also: Focus plus Context, Focus and Context)
- A visualization interaction paradigm that integrates a detailed focus region and its surrounding context into a single unified view, rather than separating them. Techniques include fisheye views, semantic zooming, and lenses that distort or overlay content so users can see fine…
- Functional Vision(also: Functional Visual Ability)
- How well a person uses their residual vision to perform routine tasks under various conditions throughout the day. Functional vision goes beyond clinical measures like visual acuity to assess practical visual ability in real-world contexts — such as reading, identifying objects,…
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