Vision Difficulties and Impairments

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Vision Difficulties and Impairments include the following:

  • Low Vision
  • Color Blindness
  • Blindness

There are many options for individuals with vision difficulties to modify the computer displays and appearance so it is more legible, or receive information through sound or touch. Those who are blind cannot use a computer monitor and but have the option to receive information from their computers through hearing or touch offered through screen readers and Brailledisplays. [1]


Assistive Technologies

  • Screen enlargers(or screen magnifiers) work like a magnifying glass. They enlarge a portion of the screen as the user
    moves the focus—increasing legibility for some users. Some screen enlargers allow a user to zoom in and out on a
    particular area of the screen.[2]*Screen readers are software programs that present graphics and text as speech. A screen reader is used to verbalize,
    or "speak," everything on the screen including names and descriptions of control buttons, menus, text, and punctuation.[3]*Speech recognition systems, also called voice recognition programs, allow people to give commands and enter data using
    their voices rather than a mouse or keyboard.[4]*Speech synthesizers (often referred to as text-to-speech (TTS) systems) receive information going to the screen in the
    form of letters, numbers, and punctuation marks, and then "speak" it out loud. Using speech synthesizers allows blind
    users to review their input as they type.[5]*Refreshable Braille displays provide tactile output of information represented on the computer screen. The user reads the
    Braille letters with his or her fingers, and then, after a line is read, refreshes the display to read the next line.[6]*Braille embossers transfer computer generated text into embossed Braille output. Braille translation programs convert
    text scanned in or generated via standard word processing programs into Braille, which can be printed on the embosser.[7]*Talking word processors are software programs that use speech synthesizers to provide auditory feedback of what is typed.[8]
  • Large-print word processors allow the user to view everything in large text without added screen enlargement.[9]

See Also

Software

Dolphin Guide: This is perfect for the novice computer user who may also benefit from screen reading and magnification. The software is produced by the Dolphin Company along with other products targeting the VI population.


References

  1. http://www.microsoft.com/enable/guides/vision.aspx
  2. http://www.microsoft.com/enable/guides/vision.aspx
  3. http://www.microsoft.com/enable/guides/vision.aspx
  4. http://www.microsoft.com/enable/guides/vision.aspx
  5. http://www.microsoft.com/enable/guides/vision.aspx
  6. http://www.microsoft.com/enable/guides/vision.aspx
  7. http://www.microsoft.com/enable/guides/vision.aspx
  8. http://www.microsoft.com/enable/guides/vision.aspx
  9. http://www.microsoft.com/enable/guides/vision.aspx