I got my first pair of glasses when my hunting buddy could see gophers I couldn't. On the next year's hunt, I had them too - wow- what a difference. Then I tried shooting an open sighted rifle with them - not worth a whoop - the progressive lenses were just as Roger noted - they were out of focus in the upper left corner where I was looking at sights through. I struggeled for the two years, then got a new perscription- again, my long distance perscription, but with bifocal - and a high bifocal to easily see the computer screen. The long distance perscription is the total area of the upper lense, not just in front of the pupil with eye's front. with these glasses, the front sight is barely fuzzy, the rear more so, but I manage to shoot not too badly with them. I've tried shooting with low power magnifyers, and didn't like not seeing the target well. Perhaps I need more practise with them before making a decision.