How to hide any text from sighted user and search engine but not from screen reader?

Posted by metal-gear-solid on Stack Overflow See other posts from Stack Overflow or by metal-gear-solid
Published on 2010-04-24T16:22:20Z Indexed on 2010/04/24 16:33 UTC
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Filed under:

XHTML

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css

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accessibility

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screen-readers

What is the best tested way to hide any text from sighted user but not from popular screen readers? and without affecting SEO.

for example if i adding any hidden text only for screen-reader users then that text should not be crawl by search engine when search engine will crawl that page.

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