-=> Quoting Kurt Weiske to Nancy Backus on 20 Aug 11  11:09:00 <=-

 NB>> Do your contacts correct for astigmatism, or is yours so slight that it
 NB>> doesn't really need the correction...?

 KW> I always wondered about that. I have slight astigmatism in one eye,
 KW> and the prescription looks like it defines an asymmetric lens
 KW> curvature. With glasses, I can't put them on upside down, spun 90
 KW> degrees or look through the wrong lens.

There is that...  :)  Glasses are by definition going to be set up
right, once you put them on your nose and hooked over your ears...
anything else you have to TRY to do it wrong...  :)

ttyl     neb

... Any minimum criteria set will be the maximum value used.
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