Archived posting to the Leica Users Group, 2014/05/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]My ophthalmologist dials in vertical prismatic correction until I state that the images have snapped together. I?ll have to ask her whether she can also do horizontal correction and, specifically, whether she can do both at the same time. Herbert Kanner kanner at acm.org 650-326-8204 Question authority and the authorities will question you. On May 24, 2014, at 8:53 PM, Jay Burleson <leica at jayburleson.com> wrote: > Peter, why can't you try them locally? > When I was looking for one, Glazer's had several in stock and I was told > they normally stock them. > > Jay > > On 5/24/2014 1:09 AM, Peter Klein wrote: >> Some of you may remember my travails with over the last three years with >> two cataract surgeries and several complications. One lingering issue >> is that while I now have good distance vision, I also have double vision >> when looking to the right. Several ophthalmologists have slowly >> converged on the problem but never completely solved it, despite many >> appointments and several different changes of glasses. >> >> I finally had my appointment with a doctor who specializes in this >> issue, which is called strabismus. To make a long story short, my eyes >> are slightly misaligned. I had eye muscle surgeries as a kid which >> pretty much fixed it for most of my life, but with age it's reappeared. >> The cataract surgeries changed my vision from nearsighted to normal, >> which made the misalignment more noticeable. The prism corrections in >> my glasses that the other eye docs prescribed are reasonably good, but >> could be improved. >> >> The verdict is that I will never be free from glasses despite now having >> good distance vision. I am not a candidate for surgery--the misalignment >> is not serious enough to be worth the risk. I have to wait another >> month and a half for an appointment with the "ortho" person, who will >> mess with more prism corrections and get it as right as they can. >> >> All this directly affects my use of Leica rangefinder cameras. Since the >> cataract surgeries, I've found that I can focus my M6 and M8 much more >> easily bare-eyed than with glasses (I think the glasses' astigmatism >> correction simulates some degree of diopter change). So I need to take >> my glasses off to best use the Ms. All of this fiddling with glasses >> gets in the way of using the Leica quickly to photograph people, which >> is one of the reasons why I use RF cameras in the first place. >> >> What's maddening is that I know I can get the viewfinder right. I can do >> it with the little Megaperls 1.15x magnifier, which has an adjustable >> diopter (unfortunately, it's not calibrated). But I can't use it for >> real shooting with glasses, because it has insufficient eye relief to >> see the full normal lens frame, and the metal eyepiece with fingernail >> notches (for focusing) will scratch my glasses. Leica diopters have flat >> metal eyepieces, and I can't try them locally, so I have no idea what >> the eye relief will be or if glueing felt on them would work for me. >> >> I'm not giving up--eventually I'll find out what diopter I need, and >> risk having to sell it if it doesn't work. >> >> The good news, of course, is that I still can see. :-) And I will >> continue to make images somehow. But I am really bummed out by the >> possibility that I might not be able to be decisive-moment Leica RF >> people-shooter any more. I don't want that to happen. >> >> --Peter > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information