Tools for Accessing Electronic Information
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So much of the information that we receive these days is obtained through the computer, and assistive technology tools are available to help people who are blind or visually impaired get access to the information on computers. As explained in Assistive Technology Tools for Accessing Printed Information, once your child can use a computer, he will be able to use various tools for accessing print information as well.
Screen Magnification Software
There are a variety of special software programs that allow an individual to magnify what is shown on the computer screen. Most of these programs allow users to
- increase the size of the image on the screen from 2x (2 times) to 16x (16 times)
- change the color of the background and the type
- select enlarged or different color cursors and arrows
- have the computer speak, in addition to enlarging, what is on the screen
For some individuals with low vision, screen magnification software can be challenging to use, because the larger you make the image on the screen, the less of the material on the computer fits on the screen. Thus, it can be difficult for your child to keep track of where he is on the screen, especially when he is first learning to use this tool. Also, the image may appear jumpy or highly pixelated, which can be distracting to some users with low vision. Learn more about screen magnification software on afb.org.
The use of screen-reading software enables a user to hear the text that is displayed on the computer's monitor. These programs use a sound card in the computer to produce the speech, which can be heard through speakers or headphones. The user controls the screen-reading technology through the keyboard commands that tell the program what information on the screen to read aloud and to control how it is read. In the classroom, students use headphones when listening to a screen-reading program so that they do not disturb their classmates.
One of the biggest challenges of using screen-reading software is how it will handle pictures or other graphics. With each new version of these programs, the way they handle visual information continues to improve. Learn more at the Speech Systems section on afb.org.
Refreshable Braille Displays
A refreshable braille display allows the user to feel a braille representation of the text that is on the computer screen. The display consists of plastic pins that are raised and lowered to form the corresponding braille characters as the cursor moves across the print on the screen. Braille displays are typically 20, 40, or 80 braille cells in length. Braille displays must be used in combination with screen-reading software.
An accessible personal digital assistant (PDA) is a combination of a computer and a mainstream PDA. (You may also hear them referred to as electronic notetakers, but they have many more functions than just taking notes.) With these versatile tools, your child can keep an address book and calendar, use a stopwatch, word process, surf the Internet, and send e-mail. Some even have a GPS (global positioning satellite) system that will assist your child in knowing his location during travel. Accessible PDAs can have either a braille keyboard or a QWERTY (standard) computer keyboard). They may also come with a refreshable braille display so that your child can read the braille as he listens to the text that the cursor is passing over. Users can download e-books (electronic texts) to their PDA to listen to or read using the refreshable braille display. Using a cable or infrared connection, a user can print out material in either print or braille. With a flash card, the user can move files from the PDA to a computer. For more information visit the Braille Technology section of afb.org.