These have saved me money in the long run...used to need new frames almost once a year for one reason or another. Even if nothing got stepped on, the screw holes would get stripped so the lenses kept falling out or some such thing. I'm a fan of 'em, for sure!
Ugh... I hafta find a place and get an appointment.
Don't ever buy frameless glasses, you will get hooked and have to buy the same every time at a higher than framed glasses prices. I do love 'em though.