Low Vision Aids For Computer Users
In general, visually impaired people can use the same low vision aids for viewing a computer screen as they do for regular reading activities. These include eyeglass-mounted magnifiers, handheld magnifiers and stand-alone magnifiers.
But also, special software has been developed to display content on the screens of computers and other digital devices in large print. Other applications can read text and other visual content aloud with a synthetic voice.
These adaptive low vision devices let partially sighted people do the same computer-related tasks as fully sighted people — such as word processing, creating and using spreadsheets and viewing Web pages online.
Most computer operating systems and Internet browsers allow you to increase the size of Web pages and text on your computer screen to make them more visible to partially sighted users.
Here are a few simple tips for adjusting text size:
- Browser text size set at 100 percent vs. enlarged text with the zoom feature. Normal page view and magnified view after using the “Ctrl” and “+” keys on a PC keyboard
- In most browsers on a PC you can enlarge a web page on your screen by holding down the Control (“Ctrl”) key on your keyboard and tapping the “+” key. (If you use a Mac, hold down the “Command” key while tapping the “+” key.)
- To zoom out, tap the “-” key while holding down the Control key (or Command key).
- To return the view to actual size, tap the “0” (zero) key while holding down the Control or Command key.
- Some devices, browsers and applications also offer the ability to enlarge text and images with a “Zoom” command in the View menu at the top of the browser window.
- Third-party screen magnification software goes the extra step and displays not just larger text on your screen, but also larger icons, mouse pointers and other navigation items. Products such as Zoom Text, SuperNova Magnifier and MAGic will enlarge the text and images on your screen.
Also, a person with low vision will benefit most from these options for magnifying print and images when using a desktop computer with a large screen size (21 inches or larger).
Screen Reader Programs
People with tunnel vision from glaucoma or central blind spots from macular degeneration may find it difficult and tiring to read an entire computer screen. This is one reason that “talking computers” were invented.
Talking computers are powered by screen reader software based on optical character recognition (OCR) systems that first scan text in a word processing document or Web page and then convert the text to sounds. The result is a synthetic voice that reads aloud not only the actual text but also important navigation items such as the cursor location.
Apple’s VoiceOver screen reader application reads content on your iPad aloud.
Apple’s VoiceOver application reads content on your iPad aloud.
With screen reader programs even totally blind people can use a computer because they convert both text and icons to speech.
Some screen reader options include: MAGic LVS; Serotek System Access To Go; SuperNova Screen Reader; and ZoomText Magnifier/Reader.
Another option is a simple built-in screen reader called Narrator that is included with Microsoft Windows 2000. However, this program works only with certain Microsoft applications.
If you use Google’s Chrome OS operating system, it includes a screen reader called ChromeVox. If you are a Mac user, Apple includes a screen reader called VoiceOver.
If you have some functional vision, but sometimes struggle with reading certain text, a simple screen reading program may do the trick and will likely be easier to learn, since you merely select the text you want to be read aloud. Panopreter, Natural Reader and ReadSpeaker Text Aid all offer this type of functionality.
Screen Glare And Contrast Adjustments For Low Vision
If you have low vision, you should consider using higher contrast settings on your computer screen. You’ll find appropriate settings this way:
- Select Control Panel on your PC.
- Open the Display Properties dialog box and choose Appearances or Settings.
- Under the Appearances and Themes tab in more modern software, select the High Contrast option.
- Under Control Panel in modern software, you also might have a tab for Accessibility Options containing tips for low vision adjustments.
- If you have a Mac, select System Preferences and then Displays. You’ll then find options for adjusting screen resolution to increase contrast and to change the appearance, which allows you to select colors.
- Dark text displayed against light backgrounds generally is considered the best color combination for those with low vision.
To reduce glare on your computer screen, make sure you adjust window blinds to prevent reflections from outside lighting. Also, adjust the position of your screen to reduce glare from reflections of indoor lights. If needed, special screens and hoods are available to fit around your computer screen to maximize visibility.
We’ll continue with this theme, next week so be sure to look out for the next post
Very important: Always make sure you discuss and make decisions about your eye care based upon a formal appointment with your optician
For more information and to book and eye examination please contact us:
McKenna & Scott Pinelands
Tel: 021 531 1953