All of these devices lack the large displays needed to show off the fancy graphics and complicated layouts on today's sites. By making your site navigable without graphics, you benefit sighted and blind customers alike. Most of them rely on screen reader software. Screen readers use voice synthesis to read aloud the contents of windows, menus, and other interface elements. Screen readers help visually impaired users navigate a site by interpreting HTML tags, particularly those dealing with hyperlinks, Web forms, and graphics.
Blind users can then press the tab key to jump from one link to the next.
Indeed, sighted users won't even notice most accessibility tricks. The following tips are easy to implement, even on existing sites-and many also improve the surfing experience for sighted users. It's no news flash that graphics dominate today's sites. What with buttons, logos, and artwork, a single page can include a dozen or more images-many of them essential for navigation. You can tell screen readers to ignore these file names and provide valuable context for your graphics.