Hi,
I had a retinal detachment at my right eye and got the cataracts surgery mandatorily when I was 50. That was the year I restarted 35mm film developing and printing after digital. I was so concerned at the beginning and I stopped using Nikon FE and purchased a N65 for auto focus. Anyway now my right eye became better than the left; I started medium format. First I bought a Mamiya 645 with a FK402 finder (+5 to -5 diopter adjustable) then I purchased a RB67 and even use it with WLF finder with no problems. Cataracts surgery is a very simple operation that takes only 15minutes. If you have the problem get the surgery as soon as possible. Good luck for all of us who has cataracts.