Glossary
Searchable terminology from accessibility, web standards, and related fields.
74 results found in Visual Impairment.
- Table Reading Style (Table Reading Strategy, Table Browsing Style)
- The particular way in which a reader accesses and processes the content of a data table, determined by the interaction between the table's structure, content, and the reader's intent. Common table rea…
- Tunnel Vision (Peripheral Vision Loss, PVL)
- A visual impairment characterized by the loss of peripheral vision while central vision may remain intact, resulting in a narrow field of view as if looking through a tunnel. Tunnel vision can be caus…
- Virtual World Accessibility (Metaverse Accessibility, VR Accessibility for Blind Users)
- Virtual world accessibility refers to the design and implementation of techniques that enable people with disabilities, particularly blind and visually impaired users, to participate in 3D virtual env…
- Visual Acuity (VA, Sharpness of Vision)
- A measure of the eye's ability to distinguish fine details and shapes at a given distance. Visual acuity is commonly expressed as a Snellen fraction (e.g., 20/20, 20/200) or in logMAR units used in cl…
- Visual Impairment (Vision Impairment, Low Vision, Sight Loss)
- A reduction in the ability to see that cannot be fully corrected with standard glasses, contact lenses, or medical treatment. Visual impairments range from low vision (partial sight) to total blindnes…
- Visual Profile (Visual Function Profile)
- A visual profile is a comprehensive characterization of an individual's visual capabilities across multiple dimensions, typically including visual acuity, contrast sensitivity, visual field, and color…
- Visual acuity (VA, LogMAR acuity, Snellen acuity)
- A measure of the sharpness or clarity of vision, typically expressed as a Snellen fraction (e.g., 20/20, 20/200) or LogMAR value. A person with 20/200 vision must be 20 feet away to see what someone w…
- Visual field loss (Peripheral vision loss, Scotoma, Tunnel vision, Visual field defect)
- A reduction in the area of vision that a person can see, either in the periphery (peripheral vision loss or tunnel vision) or in the center (central vision loss or central scotoma). Visual field loss …
- Visual processing (Visual perception, Visual cognition)
- The brain's ability to interpret, organise, and make sense of visual information received from the eyes, involving multiple neural pathways including the ventral stream (object recognition, "what" pat…
- Visually Impaired (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 frequent…
- Voicemarking (Voice Bookmark, Speech-Based Bookmark)
- A speech-based technique for creating and retrieving semantic bookmarks in assistive web browsers. Users create voicemarks by speaking the name of a concept (e.g., "Major Headlines") and optionally a …
- Web Mobility (Hypertext Mobility, Web Navigation Mobility)
- A conceptual framework that applies principles of physical mobility and wayfinding to web navigation, particularly for visually impaired users. Web mobility encompasses the ability to move through hyp…
- Web Page Preview (Page Preview, Link Target Preview)
- A summary or representation of a web page's content provided to users before they navigate to that page, allowing them to assess its relevance without committing to a full visit. For sighted users, vi…
- Zoom cycling (Zoom toggling, Magnification cycling)
- An interaction behaviour observed in screen magnifier users who frequently alternate between high magnification (to read fine details like axis labels and segment boundaries) and lower magnification (…