Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 318 of 333
- Visual Supports (Visual Aids, Visual Cues)
- Pictures, symbols, photographs, written words, objects, or other visual items used to support communication, learning, and behaviour in individuals with developmental disabilities, particularly autism…
- Visual Verification (Visual Fact-Checking)
- The process of confirming the accuracy of information by visually inspecting the original source material. In accessibility contexts, visual verification represents a fundamental challenge for blind a…
- Visual Vernacular (VV)
- A deeply visual sign language performance art form rooted in visual storytelling, developed in the 1970s by deaf American actor Bernard Bragg and widely practiced internationally. Visual Vernacular co…
- Visual Vocabulary (Picture-Based Vocabulary, Icon Vocabulary)
- A collection of words or concepts represented through images, icons, or pictorial symbols rather than text alone. Visual vocabularies are widely used in augmentative and alternative communication (AAC…
- 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 assistance technology (VAT, AI visual assistance, Visual interpretation service)
- Technology that uses artificial intelligence, computer vision, or human volunteers to provide visual information to blind and low-vision users. Examples include apps like Seeing AI, Be My Eyes, and Lo…
- Visual authoring (Visual content creation)
- The process of creating or editing visual content such as images, graphics, videos, or layouts. Visual authoring has traditionally been one of the least accessible creative activities for blind and lo…
- Visual design space
- The physical medium related to human sight through which a user and device may interact. The visual design space is the dominant channel in most user interfaces, encompassing text, images, video, colo…
- Visual dispersion (Visual splitting, Divided visual attention)
- The cognitive challenge faced by deaf and hard of hearing people when they must simultaneously monitor multiple visual information sources, such as an instructor, presentation slides, a sign language …
- 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 guidance (Visual cueing, Visual highlighting)
- Assistive techniques that direct a user's visual attention to relevant content through highlights, outlines, magnification, or other visual cues. For people with low vision, visual guidance systems ca…
- 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…
- Visual question answering (VQA, Visual QA)
- A computer vision and natural language processing task in which a system answers natural language questions about the content of an image or video. In accessibility contexts, VQA enables blind and vis…
- Visual search
- The perceptual task of scanning a visual scene to locate a specific target among distractors. Visual search is significantly affected by low vision, visual field loss, and other visual impairments, as…
- Visual substitution (Sensory substitution, Vision substitution)
- Visual substitution is a design strategy in assistive technology that replaces visual information with output in another sensory modality, such as audio descriptions, haptic feedback, or tactile repre…
- Visual-Inertial Odometry (VIO)
- A computer vision technique that combines camera imagery with motion sensor data (accelerometer and gyroscope) to track a device's position and orientation in 3D space. In accessibility applications, …
- Visual-Motor Integration (Visuomotor Integration, VMI, Eye-Hand Integration)
- The coordination of visual perception with motor output, enabling activities like writing, drawing, catching a ball, or manipulating objects based on visual information. Visual-motor integration is co…
- Visual-Spatial Processing (Visuospatial Processing, Visual-Spatial Cognition)
- Visual-spatial processing is the cognitive ability to perceive, analyze, and mentally manipulate spatial relationships and visual information. It encompasses skills such as judging distances, understa…
- Visual-Syntactic Text Formatting (VSTF)
- Visual-Syntactic Text Formatting (VSTF) is a content presentation method that formats text based on its syntactic structure, using indentation, line breaks, and visual grouping to align with the gramm…
- Visualization Literacy (Data Visualization Literacy, Graphical Literacy, Graph Literacy)
- The ability to read, interpret, and extract meaningful insights from visual data representations such as charts, graphs, maps, and infographics. Visualization literacy encompasses skills like identify…