Last year at age 60 I was having the same problems. I added a Hiviz front sight to my GP100. I was shooting good groups out to 50 yards but I caught myself looking over my glasses. That worked on the range but when I tried it in the field I could not see the deer.

I added a Ultradot 30 to two of my revolvers and it seems to be working good on the range but I do not know about the field yet.

I also added a 2X scope to my CVA Optima muzzle loading pistol. This has worked great in the field for the under fifty yard shots but I whish I had a 3x scope for out to 100 yards.

I have killed three deer with this combination so far this season. I love the gun just need a little more power. I may add a variable to it before next season.