I have used them 3-4 times a week for several months. I put them in my pocket and take them out every time, but that's not what I wear. I didn't change lenses at all. So imagine my surprise when I saw that the frame at the top (right next to the bridge) was already cracked. These glasses are very narrow - I have to open them to put them on or the temples sting my eyes. Apparently, this stretching is enough to break the frame. I glued the pieces together but don't know how long it will last. It's fine if you're very gentle with them and/or have a very small head, but otherwise find something stronger.
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