Old Eyes - Cheap Solution
Received my new SW1911 9mm, went to the range, pistol was great, I stunk!
I could see one and a half front sights, and a really weird front dot. Just for kicks, I put on my reading glasses; I could see the front sight really good but the target was one big blur. I shot at it anyway and got one of my best groups of the day. So:
I went to WalMart and tried on readers. My RX readers are +2.25, so I tried on +1. and +1.25 and +1.5 and 1.75. For each pair I tried on I stretched out my arm and focused on my index fingernail (like a front sight) and also focused on a target about 30 to 40 feet across the store. Obviously, higher power provided very clear sights and very blurry target, and lower power gave less clear sights and less blurry target. I was seeking the best compromise, and for $7.95 bought a pair of +1.00.
I can see, I am happy, I got the best group my 72 year old eyes ever got at 10 yards, 14 shots, 11 in the bull within 2in and all 14 within 3in.