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Scole
Trad climber
Zapopan
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Mar 28, 2017 - 03:58pm PT
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If you get bi-focals remember that your feet will be blurry, unless you have them reversed with the corrected lens on the bottom and the lower prescription on the top.I learned this from an airline pilot years ago and have used them since.
I have had many experiences when guiding where clients could not walk in talus or climb well with their bi-focals on, but when they remove them they still can't climb, but at least they can walk
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WBraun
climber
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Mar 28, 2017 - 05:15pm PT
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Maybe local businesses need to learn how to compete with the internet
Local business, unfortunately, have higher overhead in their brick and mortar buildings.
This why their prices are unfortunately higher ......
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Jim Clipper
climber
from: forests to tree farms
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Mar 28, 2017 - 08:25pm PT
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duck is wise. Third eye may not need exam. If needed try this:
http://www.cureblindness.org/who-we-are/founders/geoff-tabin-md
1 part western techniques (only necessary medications), 2 parts 3rd world manufacturing cost reduction. Omit liability costs, adapt treatment to suit local culture, gonna make your sage blue eyes clear.
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Jim Clipper
climber
from: forests to tree farms
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Mar 28, 2017 - 08:48pm PT
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David,
Curved lenses are tough. Especially when you have a higher Rx. Basically, the power of a lens is determined by the difference between the front and back curves (and the ability of the material to bend light). When you start with a wrapped frame, you end up with a thick lens. Also the lens may not seat well in a frame with a different wrap/curve. The new "freeform" lenses are better able to overcome this.
Also, generally, a larger diameter lens (a wider, wrapped frame), makes for a thicker lens. There are some options: higher index materials, aspheric lenses, and freeform designs, but all are more expensive.
Contacts we were a good suggestion. Also there are inserts like these cycling glasses. Some custom labs could make an insert like this for you.
http://www.rudyprojectusa.com/index_inner.php?group_id=1&cat_id=9
Goggles over your glasses?
I'm guessing old glacier glasses were small and had side shields because it was hard to make large, wrapped, lightweight lenses. Physical optics haven't really changed, and it may still be true. Hope this helps. Please donate a dollar or maybe 2 cents to the link above if it does.
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the Fet
climber
Tu-Tok-A-Nu-La
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Mar 29, 2017 - 09:04am PT
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If you get bi-focals remember that your feet will be blurry
Good call.
I needed readers at about age 40 (so I'm farsighted). My distance vision is still good. I made the mistake of climbing with some sunglasses with a reader lens on the bottom (like bifocals) and my feet were blurry and not where they appeared to be.
So if you're distance vision is going out (nearsighted) you'll need regular glasses for that for climbing, or reverse bifocals as mentioned, but then I guess your hands above you would be out of focus and not where they appear to be.
Costco is great for so many things if you have one nearby. Good prices on food with lots of organic stuff. Allergy pills are 365 in a bottle for the price of 60 in other places. Cheap fuel. And they're new cash back Visa card is a great deal.
Costco has decent readers in a package of 3 for $15. I got a good pair of coated prescription readers for $85 (from a Dr.) and I just leave them at my computer so they never get lost or damaged. And I continue to use the costco ones everywhere else. They are lighter and more comfortable anyway.
I just got a pair of thinoptics and stuck them on my phone case. They're only $20. Now I always have a pair handy because I always have my phone. And I don't have to stick a pair of glasses in my pocket that can get broken or are just bulky.
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Moof
Big Wall climber
Orygun
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Mar 29, 2017 - 09:51am PT
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Feather weight glasses that break when you look at them funny are all the rage. I've had slight luck with small lenses if you can find the right pair of frames that get them close enough to your eyes to have OK peripheral vision. Getting rimless, or half rimmed glasses you have to go with polycarbonate lenses that scratch much more easily than standard CR39 plastic lenses, no matter what coating they put on them, so I always end up with relatively heavy full rims with relatively heavy CR39. The number of options for full rimmed glasses is getting sparser every year however.
Being blue eyed and very bright light sensitive I always get the Transitions treatment, as dedicated sunglasses have always been a mess for me. I either lose them, forget them, or sit on them. I found out this time that you can get the "extra sensitive" option for Transitions where they get about 2x darker, which I really like. Downside is indoors they always have a slight tint. I ought to get a pair of dedicated sunglasses for the car, as Transitions don't do sh#t once your car windows filter out most of the UV.
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Jim Clipper
climber
from: forests to tree farms
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Mar 29, 2017 - 06:40pm PT
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Mguzzy: basically it sucks to lose your ability to focus your eyes. It happens to everyone. The options are: separate distance and near glasses, bifocals, progressives, or contacts.
I'd be hesitant to recommend progressives. They cost more and may not be any better for sports than bifocals. With progressives, things still look different when you look down. You can get a swimming sensation with them too. However, there is less image "jump" than bifocals, and they give you some more intermediate clarity.
Also, maybe think about sports glasses or contacts. I've seen people lose their eyes. Distance only glasses/contacts may be a good compromise. Just don't look at your watch or keep score. Finally, ask friends what works for them. You're not the only one going through it.
Fet: golfers often ask to get glasses to see the ball. If I remember, they made a round segment bifocal with a +0.50 diopter add. +0.75 may be too strong and that is usually the minimum. With a 0.50 D add you should be able to see your feet. A good eye doctor should be willing to trial the Rx, and let you stand up and put your foot on the baseboard (or something). I would think that placing gear or building an anchor would be more difficult (critical).
Del cross get a new eye doctor.
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Jim Clipper
climber
from: forests to tree farms
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Mar 29, 2017 - 10:13pm PT
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Newer freeform designs are supposed to have the potential to minimize distortions. Rx, lens material, lens "wrap", frame size, distance of the lens from your eye, lens tilt, progressive design, etc. all affect "distortions". How much those distortions affect your satisfaction clinically is more difficult to quantify.
Some people are happy in older progressive designs. People's tolerance and work environments vary greatly.
For what it's worth. I don't know who funded the studies.
https://www.ncbi.nlm.nih.gov/pubmed/27918396
https://www.ncbi.nlm.nih.gov/pubmed/27536974
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the Fet
climber
Tu-Tok-A-Nu-La
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Mar 30, 2017 - 09:44am PT
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If I remember, they made a round segment bifocal with a +0.50 diopter add. +0.75 may be too strong and that is usually the minimum.
That's great info. My vision is okay from the length of my arm on. So I'm fine for climbing/sports as long as I don't have a reader lens. But for someone who needs reading and distance glasses a bifocal prescription with a low power reading boost may be just the ticket to see your feet and hands clearly without affecting the perceived distance too much.
I started with 1.25 glasses at age 40, then a few years later went to 1.75, now I'm at 2.00. But I still have the lower power ones around. I often use the 1.75s for things like working in the shop, where I don't need to read things close up but need a little better focus a little farther out.
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Jim Clipper
climber
from: forests to tree farms
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Mar 30, 2017 - 09:38pm PT
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I did a quick search for 0.50D adds, and I couldn't find one. A good lab could tell you if they exist. Also, you may be able to do it in a freeform lens.
Alternatively, you could possibly undercurrent one eye .050D.
You could also slightly over correct your distance -0.25, and use a +0.75 bifocal add. This would give you a 0.50D add. A patient doctor who has some time should be able to trial the options in office.
Glasses like you describe may not make that much of a difference. Unfortunately, part of dealing with losing your near vision seems to be resigning yourself to the fact that there aren't any magic bullets. Most solutions are mildly inconvenient.
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Mtnmun
Trad climber
Top of the Mountain Mun
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Mar 31, 2017 - 09:50am PT
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What David Knopp said, Opticus out of Colorado is spot on for prescription sun glasses. They will send you several pairs to try on and then you can place your order. They run in the $300.00 range for distance and $400.00 for progressive lenses. This is half the price of my local eye glass shop. i have them put clear lenses in their frames as well.
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