I use prescription wire rim glasses. Bifocal. (I did trifocals for two years. Drove me nuts. Too little distance glass and I could not judge the stairs I was walking down.) Wire rim so I barely see the transition from lens to without. Periferal vision is fully effective. I find frames with a squarish outboard corners with a good views of my helmet mirror. Wire temples with the heat bendable plastic ear pieces. Set up right, they do not slip. I've used the straps with the rubber sleeves. Great for riding and miserable the rest of the time.