A trick my Old Man tried when his eyes started to south was to turn the rear sight around backwards on the barrel, putting it 4" or so closer to the front sight. He claimed it helped a lot by shortening the distance to the front sight. I don't know, I was young enough to think it kind of goofy but now it rings true. I still don't know if I want to try it. I did move the rear sight on my .45 Vincent-style Ohio Rifle forward a foot by cutting a new dovetail in the barrel 10 years ago- it does help but I'm scheming to put a tang sight of some sort on it.
