During a recent educational seminar conducted by a friend and business leader, the dialogue turned to the importance of web site accessibility. Incredulous, a seminar attendee inquired, “Why in the world would a blind person need a computer?” In the equally incredulous and reproachful commentary that followed, it occurred to me that there are probably a great many otherwise very bright and capable individuals who wonder the same thing. If you haven’t ever been exposed to someone who is blind and who makes efficient use of assistive technology to accomplish tasks, then how would you have the slightest idea what is possible? A few short minutes with a search engine can reveal a universe you might not have known existed. Sometimes, the truth is that we must admit that we don’t even know what we don’t know.
If you are a business owner, you might agree that the most rudimentary business model would be to sell as much as you can to as many as you can. With that in mind, it would make little sense to prohibit the entire population of Michigan, Minnesota, Montana and Missouri from patronizing your business. Yet, that is analogous to what would happen if you overlook the benefits of making your web site accessible to people who have vision loss.
According to the statistical snapshots taken by the National Center For Health Statistics, in the 2006 National Health Interview Survey (cdc.gov/nchs), approximately 21.2 million people in the U. S. have significant vision loss. In this case, the definition of vision loss is a broad one, but it includes individuals who have reported that they have trouble seeing even with glasses or contacts, as well as individuals who reported that they cannot see anything at all. The survey did not, however, include anyone under the age of 18, nor did it include individuals living in institutionalized housing, such as nursing homes or assisted living facilities. Of the 21 plus million, a significant portion are regular computer users. About 8 million have a post-secondary education, and 14 million or so have a household income of over $20,000 per year. Approximately 9 million are baby boomers.
Computer users who are blind or who have low vision make use of assistive technology that enables their computer to talk to them. This is achieved either by using the accessibility features already built into the operating system, or by using a software program called a screen reader, or a combination. A screen reader is a program that translates on-screen text into speech. This speech can approximate a natural human voice, or it can sound more synthesized or “robotic.” Whether a text-to-speech voice sounds more or less lifelike is a matter of personal preference, but the newest synthesized voices are fully digitized and sound very natural.
The simplest way to describe how a screen reader works is to say that the software “speaks” aloud everything that is happening on the screen that a sighted person could see. This includes, but is not limited to, pull-down menus, dialog boxes, error messages, icons on the desktop, window title bars, radial buttons, email messages and documents. Just about anything that can be seen is spoken aloud to a PC user who is blind. What the screen reader is actually “seeing” however, is not necessarily the text that appears on the computer monitor. The screen reader is in most cases making use of the underlying HTML or other programming language that is not visible to the end user.
While screen readers can read nearly every kind of web site text you are likely to encounter, what a screen reader cannot do is identify or “read,” a photograph or graphic. That is, unless the web designer embeds alt tag descriptive text behind the graphic, where it is not visible to a sighted web user.
About The Author
Laura Legendary is a speaker, author and educator specializing in disability awareness, advocacy, accessibility and assistive technology. She is the owner of Legendary Insights as well as The Insights Institute. For more information on accessibility, go to Accessible Insights.
Source: sitepronews.com
