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Performance Sunglasses
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#12
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Performance Sunglasses
On Sat, 06 Aug 2005 14:02:53 -0500, Hank Wirtz
wrote: wrote in news:1123351597.020077.82870 : Fogging can occur when you go through fog or go from one temperature to another rapidly. Hot outside to cold inside. This morning my group rode through some heavy fog off the river. My glasses were fogged up. And the guy who wears regular eyeglasses, no adaptor setup like mine, just regular single lens glasses, also had fog on his glasses. So whether you use single lens or double lens like my adaptor, both will fog. In cold weather, your own breath is the main source of fog. When cycling or skiing, your forward motion clears the moisture. With double-lens systems, the moisture is trapped between the lenses without enough airflow to clear the fog. Yes, if you're riding through a patch of especially moist air, any lens will fog on the outside, but that's far less common than your own exhalation being the culprit, and the space between the lenses is the problem. At least, that's been my experience. -Hank I have a pair of Rudy Project Kerosene, with the Rx adapter. I ride in temps down to about 30f, and up to around 90f. I haven't had any fogging, that was extreme, or a real problem. I was able to get the Rx done in a progressive lense, which makes it easier to read the cyclocomputer and to do any roadside work. With my single vision, it was a problem, fixing a flat. The Rudy Projects are pricey, for a decent value, check out the Tifosi sunglasses. The Zoom with Rx adapter. Life is Good! Jeff |
#13
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Performance Sunglasses
On Sat, 06 Aug 2005 16:38:38 GMT, Ted Bennett
wrote: Werehatrack wrote: On Sat, 06 Aug 2005 01:04:08 -0500, Hank Wirtz wrote: You get the prescription (the slip of paper with info about what correction you need) from your optometrist, obviously. Residents of California (and possibly elsewhere) may find this exceptionally difficult to obtain. My ex used to drive from Palm Springs to Las Vegas to get her glasses precisely because she couldn't find an optometrist in her area who would just hand her the scrip, but in Nevada there was no such problem. Those optometrists are not in compliance with the law, which specifically states that prescriptions are portable, which means that a lens prescription must be furnished at the patient's request anytime up to one year after the examination. A simple call to the state agency which regulates optometrists will confirm that, and they will be interested in knowing the name of the practitioner who refused to do so. My mistake; it was contacts, and this was back around '95. The regs may have changed since then. California's optometrists (or at least the ones who were hiding behind the reg) didn't want anyone to be able to get disposable contacts by mail. There were, however, states where the optometrist was permitted to dispense glasses without providing a scrip as of the last time I checked. Texas is *not* among them. The alleged rationale for this was that fitting the glasses was as important as the prescription, which has only very limited validity in the cases in which it applies. (I will note that the fashion trends which have put adjustable nose pads out of production at times can make fitting dicey, but this is not an excuse for the chicanery which unscrupulous optometrists have used in promoting such regs.) -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#14
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Performance Sunglasses
On Fri, 05 Aug 2005 20:27:19 -0500 in rec.bicycles.tech, "William
O'Hara" wrote: If I get a pair of Perf. Sunglasses such as the Radial, then how do I get the prescription? you take the nosepiece with the frames on it that fit behind the wraparound lenses to whoever you get glasses from them, and they make lenses to fit the "diopter" frames. Does anyone have op on them? Do they slide down a lot? Do they fog? Any vision problems off to the side? they don't slide much, the temples use a rubber that stay in place. they don't fog. i can see fine to the sides, but remember that the corrective lenses don't wrap like the outer lenses. i think the radials are a good buy, but that the old radials were better than the current radial 2s. i could have done without the "improvements" like the vent holes. my problem was that i lose at least one pair of sunglssses a year. |
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