The first thing to do is get some prescription shooting glasses made for handgun shooting. I recommend Decot glasses because the lenses are easily removable. I have 2 right lenses - one for shotgun and the other for handgun. They are very knowledgable at Decot and will fix you up.

I use the Burris Fast Fire on my M41 and a Hakko sight on my Ruger 10/22. I like both except there aren't any click adjustments. I also have an older Leupold tube type red dot which has the click adjustments but the dot is too small (1 MOA dot)for everything except bullseye shooting.

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Dick