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Hearing impairment:

This is only an issue only if you use sound files or video with sound in your web pages. To ensure accessibility, you should provide a text description of sound files and the full text of any dialogue.

Mobility:

Some users may have difficulty in accurately and / or quickly moving a mouse around the screen. Others prefer, or are restricted to using the keyboard rather than a mouse.

The Disability Rights Commission has produced a simulation exercise which aims to give you an experience of using a site with a mobility disorder.

Key issues for users with mobility difficulties include:

• Having to click on small links (for example, either bullet points or the first letter of a word).
• Being able to skip between sets or sections of links, when long lists of links are necessary.

Seizure disorders:

For people who have epilepsy or other seizure disorders, there is one key issue:

• Words or images that flash in the range 2 - 55 times per second could cause a seizure.

These key issues are addressed in the W3C's Web Content Accessibility Guidelines.

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Original pages: April 2001 by John Walsh
last updated: 01 January 1970 by Rachel Scudamore