Ken: Son! Friend! Buddy! It ain't you or the eyes, it's that danged stainless steel front sight blade. The same thing happens with chrome plating or nickle steel - it's the color of the dang thing that makes it tough to see.
Same thing happens to me when I go to the indoor range, or the outdoor range, and the light is bright. All my front sights have a blob of white paint on them - absolutely great for night shooting (at least placing the first shot), but not so good in the daylight.
Take a black, orange or red magic marker with you on the next trip out and color the back of the front sight so you can see it. Your scores will improve as a result and you will be able to place the front sight on your target.
OK, so the upshot is: Don't sell anything. Make it work right for you and you can enjoy your treasures for a lifetime.
Hmmm, now that makes me think twice about a nickled 1873 SAA and whether I'm gonna be able to pick up that front sight in the daylight.
Yor fren Mikey.