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Not everyone who accesses the Web can see the effects we've discussed in this book. Some 1.1 million people in the United States are blind, and they have a very different experience of the Web than sighted persons.
Fortunately, CSS is not silent on the matter of non-visual access. CSS2 included the ability to apply styles in nonlo-screen media. While most of the Web's evolution has taken place on monitors—that is to say, in a visual medium—CSS2 can be used in non-visual media, assuming that the user agent has proper support.