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#21
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Prescription eyeglasses for touring
On May 28, 10:46 am, wrote:
Jeff Liebermann wrote: I'm not an expert on frame selection and have limited experience. As I understand it, the leather covering around the sides and top of the "glacier" eyeglasses is to prevent snow blindness and "light leaks" for alpine climbers. I don't think they're particularly applicable for bicyclists (unless you enjoy the smell of sweat soaked leather). Point taken Problem is.... I very near sighted and its best for me to keep lens dimensions as small as possible otherwise I get very thick heavy glasses plus vision distortions in peripheral vision So.... was thinking some kind of "John Lennon" style glasses with darkening material around rest of filed of vision Don't obscure your peripheral vision - especially if you may be riding in any traffic. |
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#22
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Prescription eyeglasses for touring
My prescription is -4 in one eye, -5 in the other. I always wear glasses, and
when I started riding a lot wanted wraparound sunglasses, mainly to cut down on stuff getting in my eyes. My regular optician, with whom I've been happy for years, said he couldn't do wraparounds for my prescription. I went to another optician who was recommended by friends who ride, and got a pair (brand is "bollé") that's worked great for me. So I think it's important to find someone who's experienced with this type of eyewear. |
#23
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Prescription eyeglasses for touring
On May 28, 9:15 pm, Jeff Liebermann wrote:
On Fri, 28 May 2010 17:27:31 -0500, wrote: Mark Cleary wrote: I was really myopic and had lasik surgery almost 10 years ago, it was a blessing. yes this is what I should do above.... but too damn CHICKEN.... Stay chicken. Among my aquaintences, I know of 2 successful operations, 1 neutral, and 1 disaster. Lots of horror stories on the web: http://lasikdisaster.com http://www.lifeafterlasik.com Problem is.... I very near sighted and its best for me to keep lens dimensions as small as possible otherwise I get very thick heavy glasses plus vision distortions in peripheral vision Prescription bicycling eyeglasses: http://www.bicyclerx.com Looking at lenses on the ZenniOptical web pile: 1.50-1.59 Typical plastic (polycarbonate) lenses. 1.61-1.67 High index -4 to +3 diopters 1.75 Very high index -5 to +4 diopeters. Hmmm.... other sites claim larger corrections. For over 5 diopters, the lenses will probably end up being glass, which is going to be heavy. With 1.7-1.90 glass it is possible to go up to -12 to +12 diopters. The price is outrageous, the glass is brittle, and it does not work well for bifocals. Where does your prescription fit? Beyond minor vision corrections, I don't have any experience. If your vision is really awful, then professional help will probably be required. Just about anything can be tinted or darkened to make sunglasses. Clip-on or magnetic sun shades will also work. Wrap around lenses and corrective optics don't mix well. At a minimum, make sure the frame does not obstruct your peripheral vision. You may not be able to focus correctly to the sides, but at least you'll see a large vehicular out of focus blob coming your way, and be able to get out of the way. This last part does not sound even remotely acceptable to me. If you have depth of field issues due to the high power of the lenses, I'm not sure exactly where to optimize the focus. My guess(tm) is approximately 5-10 meters ahead, which is my guess of approximately your reaction time plus stopping distance. The scenery and the handlebar mounted computah won't be in focus, but anything ahead you might hit or run over, will be. If you want something better, look into progressive or bi/tri-focal optics. You'll probably get better optical advice he http://www.optiboard.com/forums/forumdisplay.php/11-General-Optics-an... After regular riding for a couple years mostly without any glasses, I went to the eye doctor that was on list for Rudy Project. Those were too expensive, though - at least in the configuration I wanted. So they fixed me up with Bolle Anaconda. These are really great (although to get them took six months and two pair rejected for really poor quality of construction). Supposedly, Bolle has their own special secret formula ("Spazio") for wraparound lenses with correction. The side vision can be a little bit weird with the Rx correction and wide wraparound, and this was very noticeable and disconcerting with the first pair - which I rejected mostly for other reasons. These were put together very poorly, with really shoddy finish work - obviously slapped together in a hurry (after waiting in the queue for like six weeks) by inexperienced craftsman - the lenses even seemed visibly out of place to me. I expected the peripheral artifacts of wraparound and correction would be something I'd just have to get used to, but the final pair (Quality Inspected by Larry) are really excellent in this regard, and I do not notice any problems - really very excellent. But yeah - there is some specified limit to the amount of correction they will do with the wraparound lenses. |
#24
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Prescription eyeglasses for touring
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#25
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Prescription eyeglasses for touring
On May 25, 8:26*am, wrote:
I'm thinking along the lines of a mountaineering type frame with prescription lenses that automatically turn dark in sunlight. Frames would have some kind of leather covering AROUND frames and lens to "cup" the eye from all sides and block light coming in thru sides Anyone wearing such glasses or have even better idea? I did the background on this relative to biking and kayaking. The costs are incroyable compared to the cost effectiveness compared to: http://www.yorktowneopt.com/miva/mer...Co de=Instant acheiving basically the same level of protection usually for $35. the wind wings cover the basis. tape the nose pieces togther with magic or sctoch vinyl electric Yorkes' reduction is at the limit of sea-ability for my eyes when on the water. More would be better for a long period on the water but begin limiting visual acuity for small task seeing. Alpine touring reduction doesn't lend itself to watch repair. REI has a selection of retaining straps if ura so inclined. |
#26
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Prescription eyeglasses for touring
get two each dark brown and light brown, one grey for riding into the sunset, and one yellow shooter's for night vision against oncoming traffic. the light brown is excellent all round plus producing a deep blue sky, hi def puffy cumulus, and definite object definition. http://www.yorktowneopt.com/miva/mer...Co de=Instant |
#27
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Prescription eyeglasses for touring
I just wear my regular glasses, which have a set of magnet clip-on
lenses that match perfectly. They work fine. My eyes get a little irritated on long rides on windy days sometimes. |
#28
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Prescription eyeglasses for touring
On 6/8/10 10:30 AM, Tim McNamara wrote:
I just wear my regular glasses, which have a set of magnet clip-on lenses that match perfectly. They work fine. My eyes get a little irritated on long rides on windy days sometimes. In the same vein, I wear a pair of inexpensive Smith wraparounds right over my prescription glasses. BC |
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