I shot with bifocals for years. There was a small magnifier at the bottom of the lens that I used for close up. The rest of the lens was for distance. Worked fine. Oddly enough, my day to day glasses were progressives. This last go round on shooting glasses I changed to progressives and they have worked fine too. The main thing I had to watch out for was making sure that the lens was positioned correctly in relation to my eye for shooting.