Hmmmmm? I am not sure what is going on with 'old eyes.' I am 90, pushing on 91, and not hunting anymore. However, I just randomly picked up one of my 18 rifles, [Charles Daly Hawken style by Investarms] took it outside and aimed at a neighbor's stump, about 65 yards away. I could see the front sight clearly. The rear sight and the stump were only a little bit fuzzy. I have macular degeneration in my left eye with a torn retina, have had cataracts removed, with new lenses, in both eyes. I can't get glasses that really work but evidently something is right with these 'old eyes.' I'm not complaining. Polecat