Vision Agnosia

An inability to recognize objects by sight.

Usher Syndrome

A genetic disorder with both visual and hearing loss possibilities, Usher syndrome is characterized by hearing impairment as well as an eye disease called retinitis pigmentosa in which vision degenerates (gets worse) over time. Some people with Usher syndrome also have balance problems. Usher syndrome is the most common condition (aside from aging) that affects […]

User Friendly Design

The concept of user friendly or Universal Design, a term coined by the late Ronald Mace, is to make products, services and the built environment “aesthetic and usable to the greatest extent possible by everyone, regardless of their age, ability, or status in life.” This concept is used to describe architecture, interior and product design, […]

User Expectations

One method of determining user expectations is to look at commonly used products or services to see how they handle a similar situation. Your users will expect your product or service to behave the same way in similar circumstances. To decide which is the best option, you need to determine who will be using it, […]

Translation Software

These word processing programs allow the use of print characters on the screen while entering, editing and formatting text, and then use a single keystroke to translate the print to braille. The software applies rules for braille according to algorithms. The result of the translation is displayed on the screen in a variety of possible […]

Transcription Software

Computer software that converts print documents into braille. The user does not need to understand braille to use the software but relies on the formatting rules built into the software to produce braille.

Transcriber Note

Notes written to explain visual graphic items such as photos, flow charts, graphs, floor plans, forms to complete and tables. These are used to help visually impaired readers understand what’s on the printed page being converted to braille or audio versions. Notes used in audio production are often called Reader’s Notes.


A contagious disease of the conjunctiva and cornea, caused by the gram-negative bacterium Chlamydia trachomatis and characterized by inflammation, hypertrophy, and formation of granules of adenoid tissue. It is a major cause of blindness in Asia and Africa.

Tiger Font

The Tiger font is used by the Tiger embosser to produce tactile graphics.

Tiger Embosser

This is a braille tactile graphics embosser that can emboss text and graphics directly from Windows applications using its own driver software. These machines print braille at a resolution of 20 dots per inch, single-sided or interpoint. The Tiger interprets color and shades of gray in visual images with embossed dots of varying heights. Braille […]

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