home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: alt.callahans
- Path: sparky!uunet!cs.utexas.edu!swrinde!sdd.hp.com!news.cs.indiana.edu!umn.edu!csus.edu!netcom.com!aahz
- From: aahz@netcom.com (Mean Green Dancing Machine)
- Subject: Re: Sunglasses (was Re: Hats)
- Message-ID: <1992Dec31.125958.25774@netcom.com>
- Organization: Don't blame me, I voted for Bill 'n' Opus
- References: <vkt2dkd@rpi.edu> <1992Dec26.184359.15289@netcom.com> <OLSON.92Dec27004455@husc8.harvard.edu>
- Date: Thu, 31 Dec 1992 12:59:58 GMT
- Lines: 33
-
- In article <OLSON.92Dec27004455@husc8.harvard.edu> olson@husc8.harvard.edu (Chip Olson@somewhere.out.there) writes:
- >In article <1992Dec26.184359.15289@netcom.com> aahz@netcom.com (Mean Green Dancing Machine) writes:
- >>
- >>I wear glasses, too, and I use clip-on polarizing sunglasses. They're
- >>pretty cheap ($5-$15, usually), and they *really* reduce the glare.
- >>Someday I may get a pair of darker prescription lenses for when it's too
- >>bright, but it really ticks me off that I can't get prescription
- >>polarizers....
- >
- >"I am also among the myopic, and I have a pair of prescription sunglasses,
- >and they work really well for me. Dark enough (due to my lens thickness)
- >to protect against everything short of staring directly at the sun, and
- >they're glass so the UV doesn't get through. Cheap sunglasses can be worse
- >than useless- if they're not UV-protective, they let more UV in than if you
- >weren't wearing anything, because your pupils are dilated more. They did
- >cost a bit, but they were 100% worth it. Only problem is that switching back
- >and forth can sometimes be a pain, but I'm used to that."
-
- Actually, if you're careful, I'd say that the far worse long-term danger
- is optical distortion. I have no idea what effect (if any) that has on
- my eyes. In any event, I always make sure that my prescription lenses
- have a UV coating, anyway.
-
- The real point that I'm making is that polarization is the only way to
- reduce glare relative to the actual brightness level. (Unless someone
- more knowledgable about optics corrects me?)
- --
- --- Aahz (the *other* Dan Bernstein)
- @netcom.com
-
- Hugs and backrubs -- I break Rule 6
-
- Virtual anniversary: 1 day and counting
-