[Leica] Leica M diopters (Myopia vs. Presbyopia)

[pklein at threshinc.com (Peter Klein)]

Thanks for your thoughts, Sonny. My eyes lose horizontal alignment when 
I look far to the right.  It's called strabismus. Doing "monovision" 
(one eye distance, one eye near) is not a good idea, because it can make 
strabismus worse. This is why I need some horizontal prism to keep my 
eyes aligned when looking to the right. I can get along fine without it 
for just casual walking around, but I need it to drive, or I start 
seeing two cars on my right where only one is really there! Also, 
contacts don't do prism correction, so I wouldn't be able to drive that way.

* Using the Leica viewfinder bare-eyed, I see OK but not perfect. Add 
the Megaperls magnifier w/diopter, and it's almost perfect.
* With the bifocal glasses, seeing out of the viewfinder is blurrier. If 
I could use the Megaperls, I would see just fine, but it would scratch 
my glasses.

Wearing my bifocals seem to be the best universal solution, at least 
with a normal lens and longer. That is, if the Leica diopters have 
rubber and not metal for the eyepiece. So I need a diopter with a rubber 
eyepiece if I'm going to shoot the Leica with my glasses. Then I'll be 
able to see the controls.  If I'm going to shoot bare-eyed, then I need 
some way to read the controls.

--Peter


Sonny wrote:
 > When I had my cataract surgery, I had them do my left eye for distance
 > vision and my right eye for close, as I shoot Leica with my left 
eye.  So I
 > don't need glasses for most things.   I do wear them for reading to fine
 > tune.
 >
 > Why wouldn't one contact help you out?
 >
 >
 > On Sat, Jul 6, 2013 at 7:11 PM, Peter Klein <pklein at threshinc.com> 
wrote:
 >
 > > Question:  Do the Leica diopters have a rubber eyepiece or a metal one?
 > >
 > > Here's why I ask.  Yesterday's shooting with my M8 brought home a 
change.
 > >  I am no longer nearsighted in either eye, so briefly taking off my 
glasses
 > > to read the controls no longer works.  For distance vision, my left eye
  ...  blah blah blah etc....