Glossary
Searchable terminology from accessibility, web standards, and related fields.
87 results found in visual impairment.
- Visual Question Answering (VQA)
- A task in which a system receives an image and a natural language question about that image, then generates a natural language answer. VQA emerged as a key accessibility paradigm through services like…
- 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 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…
- Voice and Video-Capable Language Model (VVLM, Multimodal AI Assistant, Video-Capable LLM)
- A large language model that can process real-time or near-real-time video and audio input alongside text, enabling conversational interaction about the visual world. VVLMs represent a shift from stati…
- White Cane (Long Cane, Mobility Cane, Blind Cane)
- A lightweight, typically white or white-with-red-tip cane used by blind and visually impaired individuals as a mobility aid for detecting obstacles, changes in terrain, and environmental features whil…