RE: sight problems
To some extent I would agree with jersey. Have you considered contacts?
Am I right in surmising that you can see the pins though they may be a bit blurry. The target itself is still crystal clear though, yes? That may not be as much of a problem as you think. Many folks encourage the shooter to focus on the target and not the pins in order to eliminate some forms of target panic and promote a more relaxed, subconscious shot.