Every ophthamologist (3 total) I have visited over the last 15 years continues to wear glasses. That includes an ophthamologist who is a pioneer/leader in the laser eye surgery field. When I asked one of these ophthamologists if the surgery was safe the good doctor replied: "I still wear glasses don't I?"
And the protective value of eyeglasses against airborne particles and debris is another good reason to stick with them. Besides, you can always have your eyeglass prescription easily and quickly tweaked, too.
One of the reasons I've been told folks use PDFs is to maintain control of the content. Official releases can be versioned, digitally signed, and access protected via PDF. So if the content is found on the web and isn't in PDF or it is a PDF without the appropriate watermark or digsig a company can more easily deny the authenticity of a fraudulent document. Not that there aren't loopholes, but it keeps the honestly inclined a bit more honest.
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And the protective value of eyeglasses against airborne particles and debris is another good reason to stick with them. Besides, you can always have your eyeglass prescription easily and quickly tweaked, too.
One of the reasons I've been told folks use PDFs is to maintain control of the content. Official releases can be versioned, digitally signed, and access protected via PDF. So if the content is found on the web and isn't in PDF or it is a PDF without the appropriate watermark or digsig a company can more easily deny the authenticity of a fraudulent document. Not that there aren't loopholes, but it keeps the honestly inclined a bit more honest.