Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Teacher of the Visually Impaired(also: TVI, Vision Teacher, Teacher of Students with Visual Impairments)
- A specialized educator trained to work with students who are blind or have low vision, providing instruction in skills such as Braille, use of assistive technology, orientation and mobility, and adapting educational materials for visual accessibility. In music education, TVIs…
- Telescopic Magnifier(also: Bioptic Telescope, Telescopic Glasses)
- A small telescope mounted in or attached to eyeglasses that provides magnification for viewing distant or intermediate-distance objects. Telescopic magnifiers are used by people with low vision for tasks like reading sheet music, watching performances, or reading signs. While…
- Tiresias(also: Tiresias Screenfont, Tiresias Font Family)
- A family of typefaces developed in 1998 by the Royal National Institute of Blind People (RNIB) specifically designed for legibility on screen displays, particularly television subtitling. Named after the blind prophet of Greek mythology, Tiresias became one of the most widely…
- Tunnel Vision(also: 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 caused by conditions such as retinitis pigmentosa, glaucoma, or stroke. It…
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