Designing Your Web Site for the Blind
Yet those of us who are fully sighted forget that as we make the Web our main information vehicle, we may be cutting out millions of customers or potential customers. And these millions (5 to 10 million in the U.S. alone, by some estimates) have every moral and legal right to have access to that information.
Ball, Guy. Boston Broadside (2001). Design>Web Design>Accessibility>Visual