An accessible site allows all users to access it, regardless of their browser, resolution, settings, or eyesight. Accessible sites are open to the world's 750 million disabled people, including the sizeable blind population. Through better authoring, Web information providers can avoid shutting out the world's disabled population from the information age, and can garner a good portion of this largely ignored market.
Quinn, Liam. Web Design Group, The (1997). Design>Accessibility>Web Design