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…
- Heads-Up Display(also: HUD)
- A transparent or overlay display that presents information in the user's direct line of sight without requiring them to look away from their current viewpoint. Originally developed for aviation, HUDs are widely used in virtual and augmented reality to attach interface elements —…
- High Contrast Mode(also: High Contrast, High Contrast Display)
- An operating system or browser display setting that increases the visual distinction between foreground and background elements by using a limited colour palette with strongly contrasting colours, typically black and white or bright colours on dark backgrounds. High contrast…
- Microsoft HoloLens(also: HoloLens, HoloLens 2)
- A self-contained, optical see-through mixed reality headset developed by Microsoft that overlays holographic content onto the real world. The HoloLens 2 features hand and eye tracking, spatial mapping, and gesture-based interaction, making it suitable for applications in…
- Pre-compensation(also: Display Pre-compensation, Image Pre-compensation)
- A technique in which images displayed on a computer screen are mathematically modified in advance to counteract the visual aberrations of the viewer's eye. Rather than relying on corrective lenses or magnification, pre-compensation transforms the source image so that when it…
- Refreshable Graphics Display(also: Tactile Graphics Display, Dynamic Tactile Display)
- A device that presents tactile graphics and diagrams through an array of pins that can be individually raised or lowered to create dynamic, changeable tactile patterns. Unlike static tactile graphics (embossed paper or thermoform), refreshable displays can show sequences of…
- See-Through Display(also: Optical See-Through Display, Transparent Display, OST Display)
- A display technology that allows users to view digital content overlaid on the real world by projecting images onto a transparent or semi-transparent surface. Unlike opaque (occlusive) displays that block the user's view of the environment, see-through displays preserve direct…
- Visual Fatigue(also: Eye Strain, Asthenopia, Visual Strain)
- Discomfort, tiredness, or reduced visual performance resulting from prolonged or intensive visual tasks. For people with low vision, visual fatigue can occur more quickly because they must exert greater effort to see, often using non-optimal parts of their retina (eccentric…
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