As I slowly turn into an old buzzard (or not so slowly?) I'm running into the normal falling-apart-with-age issues that affect my activities. The latest is a cataract in my right eye causing deterioration in the focus. I'm right handed and right eyed and I'm fond of iron sights. I've started the process of catataract surgery to fix it and have a question to which someone here might know the answer. I've already been through this with my left eye so I know the drill as to the overall process. When I had my left eye done, I asked for the new lens to have a focal length that allowed uncorrected vision within arms length so I can read and do machinist/drafting type work without HAVING to have glasses. This has worked out well and I still wear glasses (as I have for years) for distance vision. I have the option with the right eye of getting 20/20 distance vision (which would be new and different for me). My question is will that work for iron rifle sights or should I opt to de-tune this eye just a bit so I can see iron sights in the event I've misplaced my glasses? I don't mind wearing glasses and do for safety reasons but I don't want to be helpless without them. Thoughts/suggestions/experience on the best compromise?