I hear ya Brian Dale....
I'm just behind you in age, yet the 'Vision Specialist' -yet another part of that 'Medical Practice' fraternity, (they still can't get things right so they practice on you and me), did prescribe the double vision lens's to me already a year ago. I know, I'm just putting off the inevitable.
My lever guns, God willing, will never get scope/optic mounts. I would really like to put a tang style flip up Williams on my post Viet Nam era Marlin. (cross bolt safety) Since it's quite capable of taking pop cans at 150yds and an 8" steel plate at 200m off hand. I think I can do a little better with some more practice.
But when the time comes, I think one of the Ghost Ring sights will be just the ticket.
Vision, or lack of it, (dare I correct myself and say eye-sight), seems to be the operative word here. Even though some of you have installed scopes and new Red Dot's, from what I read here, most of you would not have as long as your eye-sight would allow you to shoot ten's or to the kill zone every time with open sights.
As a side note, the buddies and I skipped the gun range yesterday. We went to the hills to a gravel pit with the snow flying. I regretted leaving the lever guns home once we were there shooting pistola's and some other rimfires. Still, that Prestone jug wasn't too hard to hit with the 5" RedHawk at 125yds. Wouldn't even have been a challenge with the open sights on the lever guns.
-Steve