I've been thinking about ordering a pair of dedicated shooting glasses for a couple months and finally acted on it. My wife was ordering a pair of prescription sunglasses so I threw a trial pair on the order for me to save the shipping.
I wear prescription glasses and being well into my 60's I need bifocals most of the time. Anyone wearing bifocals knows the problem with trying to shoot handguns or rifles with fixed sites. You end up looking like a bobble head doll trying to find a way to get both the sights and the target into the best focus. So I dropped the notion of bifocals and ordered a pair with the left eye prescription for long distance and the right eye for about 30". Last night they showed up, and I have to admit it was a bit strange at first. I could close my right eye and everything across the yard was nice and clear, close the left eye and the phone in my hand was in perfect focus. It took maybe 15 minutes wearing them before I no longer noticed the weirdness. So I picked up my SIG and sighted at the back of the yard. I actually laughed. Both the bird feeder and the sights were in focus. It works. It's probably been 25 years since I've seen that sight picture. If it had been earlier in the day, or if the range was a little closer, I would have already tried them out. It looks like Friday is going to be a range day for me. I'm stoked.
The beauty is that an online manufacturer (I use zennioptical.com) can make single vision no frills glasses for $7 a pair. That was cheap enough to try and throw them out if I didn't like the results. I ordered a large frame aviator style for a little more protection and they came with polycarbonate lenses at that $7 price. No, they aren't they highest quality shooting glasses and I know that some other lens materials would offer better protection. I'm due an eye exam soon so I'm sure a another pair with my new prescription will be ordered. Maybe then I'll order the thicker lenses, antiglare, and scratch resistance. Of course that could run the price up near $20. If I'm really feeling spendy maybe I'll even opt for the auto-darkening lenses. Regarding the quality of the glasses, I have been wearing glasses from Zenni for the last couple years and have no complaints. The pair I'm wearing now (they were $7 back then too) are from my first order and they are holding up just fine with daily wear.