Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- View Hierarchy(also: UI Hierarchy, Accessibility Hierarchy, DOM Tree)
- The tree-structured representation of how user interface elements are organized and nested within an application. The view hierarchy defines parent-child relationships between UI components, specifying which elements are contained within others and how they are grouped. This…
- Visual Affordance(also: Visual Affordances)
- A visually conveyed cue that signals how an object can be used or what it represents - for example, a handle suggesting 'grasp', a button suggesting 'press', or color and labeling suggesting product identity. Many visual affordances are inaccessible through touch alone: blind…
- Visual Orchestration(also: Visual Attention Management)
- A design orientation, articulated by Huffman et al. (2026), for deliberately coordinating visual cues, salience, timing, and layout so that participants in a shared environment know where to look, when to shift focus, and how interactions unfold — especially for users who rely…
- Visually Impaired(also: Vision Impairment, Visual Impairment, BVI)
- An umbrella term for any degree of reduced visual function that cannot be fully corrected with standard glasses or contact lenses, ranging from mild low vision to total blindness. The term is frequently combined as BVI (blind and visually impaired) in accessibility research to…
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