This presentation will cover not only the basics of good web site design, but will include a demonstration of technologies that allow the museum professional to create web sites that can really be used by all. Visual Impairments People with visual impairments range from the totally blind to people who have some difficulty reading small print. Visually-impaired users can best be accommodated by supplying alternate text for all images and graphics, ensuring that navigational icons are large and easy to distinguish, and page layouts are flexible. Some visually-impaired users may need to set the default font size in their browser to a larger value. Select this text , to see an example.
Some people are color blind.
Green text on a red background can not be distinguished by some people. Although the current implementation of style sheets is poor and interpretation by different browsers is inconsistent, they promise to make access by visually-impaired users easier. The use of embedded text is an especially large problem. Embedded text is text that has been incorporated into an image. Just as important, the text is not available to software programs that index content for web search engines.