I've been using these glasses for over a year now, and love them. I'm considering buying a pair for every vehicle I drive just so I can be sure to always have a pair on hand. My first time using these glasses was on a stretch of interstate in the bright morning sun. After putting these glasses on, I could literally feel my eyes relax. No more headaches or eye fatigue from driving! They're also extremely durable and scratch resistant. Buy them, you won't be sorry.