I also wear progressive lenses. But, I don’t seem to have that problem when shooting rifles. I shoot handguns, primarily, but have been known to shoot AK-47, AR-10, and AR-15 with a friend. He has scopes on both ARs, but the AK still uses iron sights. I never noticed a problem with the progressives. However, it took me a long time to get use to the progressives when playing golf.
Spieth must have been wearing progressives yesterday down in Atlanta.
;-)