I have prescription recreational style wraparound glasses, that I wear while hunting, snow machining, 4-wheeling, boating, or flying. I have two sets of lenses, one polerized sun glass lens, amd the other untinted glass. They are not bi-focal, they are my reguler perscription, my other glasses that are bi-focal has just plain glass with no correction in the bottom. We have so much sunlight during the summer, and snow all winter and spring that I need the sunglasses. Then in the late evening I put in the clear lenses. I do have reguler bi-focal glasses that I use while driving, that is the only time I wear them. Around the house, or yard I never wear them. In fact my perscription is so light most people don't think they are perscription. A few times guys have grabbed them and wore them half the day and never knew the differance, thinking they were just plain recreational eye protection sunglasses.
I do have problems with reguler open gun sites tho. I can not focus one the target, front site, and rear site at the same time. So therefore I use peep sites.