I wear progressive bifocals all the time EXCEPT for shooting. I have had them since early 90's, and if you get them, it takes a few weeks to get used to them. I get the transition darkening in the lens also. I tried them several years ago for trap and found myself moving my head slightly up and down to focus, that did not work well. Got my eyes checked again and got a pair of Ranger XLW with a insert with my distance only for shooting, works great with any type of shooting.
I have been wearing progressive bi focals for years but put them in the bag when it's time to shoot. I had a set of target orange and a set of clear lenses ground to my prescription for distance. You can always put your bi focals on if you want to read something like the rule book or the program.
I use mine. With my head on the stock I am looking through the upper lense which is for distance. Then I realized I could live without the reading prescription on the bottom part of the lense while shooting. So I had some single vision distance Rx lenses made. These are better. Wider in focus field of view ( the whole lense compared to just a portion with progressives). And cheaper too. Now my progressives are my back up.
I have the Ranger xlw with the prescription insert. Works very well for me. The bi focal is small. I can see the receiver better and the small bifocal does not get in the way of locating the target.
You get a bigger Optical center not having the bi focals according to my Eye Doctor ... I have had corrected vision since I was was in my 30's, tried a pair of Bi Focals one time, not for me, not saying they won't work for others ... I had corrective cataract surgery 06-05-17, as of today (06-06-17), I can see like an Eagle with blurry vision in one eyes get the other done next week ... I am not a fan of Bi focals, now I will be able to use my Non RX shooting glasses again ... WPT ... (YAC) ....
I had a pair of Bi focal lenses made to fit the frames on my Decot shooting glasses , I found them to be a bother more than a help and they cost me about $200.00 (maybe more ) ... WPT ... (YAC) ...
For many years I had trifocals in all of my shooting glasses and it never caused a problem. I could put on my shooting glasses in the morning and I could shoot,I could look at the scoreboard, I could check out a gun problem and never have to change glasses. With properly fitted glasses and the optic center of your lenses in the correct place there should be no problem with bifocals or trifocals in your shooting glasses other than the cost. Since I had cataract surgery 10 years ago I now wear Plano lenses. Dave Berlet
My Eye Doctor actually had me bring my gun, my frames and a pair of lenses to her office so she could get the optical centers in exactly the right place on the new lenses, she reduced the bi focal part of the lenses to less than a 1/3 of the lenses from the bottom so it would not be a problem while I was shooting ... The lenses were checked for distortion once they were made and they said there was none even though there did seem to be some to me (mind games ) ... It was worth the try but turned out to be a waste of money as far as I am concerned , there fore I would not recommend them ... WPT ... (YAC) ...