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Web Design Guidelines For Low-Visioin Readers

Goals of accessible web design relative to low vision users are:
  • To ensure that text is large enough because low vision users usually need screen magnifier to enlarge the text;
  • To provide audio option to notify low vision users about new information or state changes;
  • To minimize the users’ memory load because the effective screen size is very small while using screen magnifier;
  • To enable users to locate information quickly


Fonts

Most legible fonts for people with low vision have no serifs and a fixed width such as Verdana, Arial and Helvetica. 

APHont (pronounced Ay-font), is designed for low-vision readers.  This font has characteristics that enhance reading speed, comprehension and comfort for large print readers. In addition to having no serifs, APHont features higher crossbars, wider letters, heavier letters, more open letters and larger punctuation marks than most other fonts.
 

Colors
 

Ensure that foreground and background color combinations provide sufficient contrast when viewed by someone having color deficits or when viewed on a black and white screen.

For more information please refer to w3c standards for web design accessibility: http://www.w3.org/TR/WCAG10-TECHS/#gl-color