Ensure that colour-blind users can read your pages by testing them on a black and white monitor. If the contrast isn't high enough the colours need to be changed. Sound Problems People who are hearing-impaired, who do not have a sound card in their machine or who work in a noisy environment cannot hear sound clips. People will also not be able to access sound clips if they don't have the necessary software or are using a text-only browser. Solution put a link to a page with a transcript of the speech or description of the file Video Problems Video files are inaccessible to the blind, those without the appropriate software and those using text-only browsers.
Frames can also be awkward for people with small monitors as the content becomes cramped.
Consider ways of organising navigation so that it works if pages are accessed without frames avoid optimising your frames for a specific size of monitor Forms Problems Forms are very difficult for blind users to follow. Screen readers don't cope well with manipulating form elements, particularly empty text input boxes. Forms aren't supported by all browsers. Refresh Problems Screen readers take a lot longer to read pages than most sighted readers and they may not have finished reading the page before it changes. Solutions ensure that the refresh page contains no vital information or links that aren't repeated on the following page, and that the content is very brief avoid using refresh in favour of a clickable link between the two pages Forcing new browser windows Problem Visually-impaired users often navigate with the history list.