Yes, I do when I'm in the sun...
On Nov 24, 2012, at 2:31 PM, Merle Lester wrote: > > > wear a hat as well!!!!!!!....... merle > > > Joe, > > Interesting but I need corrective lenses so I'm happy with mine. Also my > elevation is only 1100 feet. > > BTW I have a 14" Meade telescope though viewing here is somewhat obstructed > by all the trees around. I've thought of putting it on a platform on top of > my house which would greatly improving viewing even with the addition of some > heat distortion but haven't gotten around to it... > > Best, > Edgar > > > > On Nov 24, 2012, at 1:11 PM, Joe wrote: > >> >> Edgar, >> >> Long ago I sought a great solution for UV and light filtering in bright >> conditions, in the deserts and high mountains where we carry out our >> observing at telescopes. >> >> Our "day" there is not just "nighttime": we have tasks to do in sunny hours, >> too. Sleep hours are fewer than on sesshin. There's lots to do in the bright >> of day; and some of it may be recreational, up there. Certainly for exercise. >> >> I don't need corrective lenses, so I looked for off-the-shelf "shades", but >> those for use in climbing. The glacier-climbing glasses seemed to be the >> best optical "fit", for my hopes. So I tried the Julbo brand. This French >> outfit has been at it since 1895, and are pretty well respected; scans of >> the light filtration are available (not that we don't have technology to do >> that ourselves, but it's nice to have assurance up-front that the product >> may suit). >> >> See a low-cost entry in their catalog. I use a polarizing pair, but the >> "Sherpa" model has lenses that are even a little darker. The supple leather >> side-shields are effective in blocking what's called "fugitive-light". >> That's a very needed provision when a lens is so dark as these, because, >> when wearing them in bright conditions, the iris opens, and any fugitive >> light from sides, bottom and top can still enter the eye -- even if not to >> strike the retina -- powerfully, and begin the polymerization process of the >> lens of the eye, leading to nuclear (or worse) cataracts that we hope to >> avoid. >> >> For my use of these glasses, I carefully spray-painted the removable >> side-shields WHITE on their outside: who needs the extra heating when it's >> 115 degrees in the desert, downtown? Cooler up the Hill, though. The >> adiabatic lapse-rate of temperature is about 5 deg F for every 1000 ft of >> rise: a good rule-of-thumb. ;-) >> >> Yes, please see the inexpensive (and great) Julbo Sherpas: >> >> http://www.rei.com/product/826294/julbo-sherpa-glacier-glasses,-black,-smallpectron-3-plus?preferredSku=8262940001&cm_mmc=cse_froogle-_-pla-_-product-_-8262940001&mr:trackingCode=5C3F4BBC-FB91-E011-9A77-001B21631C34&mr:referralID=NA&mr:adType=pla&{copy:s_kwcid}=&gclid=CODyluSU6LMCFUjZQgodXV0AjA >> >> They stay on your face, too: curve-ended stems hold them on comfortably, a >> feature that's really a necessity if you do any climbing. Great for biking! >> >> This post is on-topic because these dark glasses are good for Zen students >> doing kinhin outdoors with the group on sesshin, some days in, when the eyes >> may be a little more sensitive. >> >> To LOWER the sensitivity of the eyes, just eat less of the medicinal or >> dietary Potato Leaves! >> >> All best, >> >> --Joe >> >> > Edgar Owen <edgarowen@...> wrote: >> > >> > Joe, >> > >> > My standard pair of glasses has polycarbonate lens which block almost all >> > UV much better than sunglasses. >> > > > > >
