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The Therac-25 is a computer-controlled radiation therapy machine produced by Atomic Energy of Canada Limited (AECL) in 1982 after the Therac-6 and Therac-20 units (the earlier units had been produced in partnership with Compagnie générale de radiologie (CGR) of France).
Visually impaired users can read the computer screen by using screen reader computer software and/or braille displays. Users of such a system can use a computer keyboard in the standard way for typing or can use a special keyboard driver that allows the six keys sdf-jkl to be used as a braille entry device similar to the Perkins Brailler.
It is an assistive technology device designed for use by people who cannot use a standard computer keyboard and mouse. The Lomak is clipped to an adjustable stand placed vertically underneath the computer screen and is operated by a small laser pointer mounted on a hat or headband. Some people who have arm movement can alternatively use the ...
“No one should have to be fighting cancer and insurance at the same time,” Tsoukalas, a West Lafayette, Indiana, resident who is now in law school, told CNN. “It’s such a cruel system.
Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception.In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6]
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Braille technology is assistive technology which allows blind or visually impaired people to read, write, or manipulate braille electronically. [1] This technology allows users to do common tasks such as writing, browsing the Internet, typing in Braille and printing in text, engaging in chat, downloading files and music, using electronic mail, burning music, and reading documents.
Other types include single-hand keyboards, a flat version of the fully ergonomic keyboard, a keyboard designed to be used by a single digit or headstick or mouthstick, and a robust expanded keyboard for people with cerebral palsy. Maltron keyboards are electrically compatible with IBM PC keyboards and Apple Keyboards, using USB connectors.