Thanks jn. I had a small magnifying glass that attached to the side of your eye glasses ear stems and positioned the magnifying glass in the front of the glasses for doing close work. I removed the glass and replaced it with a disk that had a small hole in it that was like a peepsight. Kind of a home made job but by Looking through the peep hole, it greatly improved the focus of the front sight blade.
I think they sell items like that for improving your shooting if I recall. Ray