Heretofore I've always made do with the <$10 cheap sunglasses you can get in discount stores and drugstores, and after a couple of months they'd start to be scratched, to be always smudged, to be bent up, and finally they'd get trashed and be replaced after six months or so.  I always wondered if there was anything to the idea that >$100 sunglasses really had anything going for them besides fashion bragging rights, and I finally decided to find out.

I've only had these a few weeks now so I still can't say for sure.  A few advantages: the glass doesn't smudge nearly as easily with fingerprints or sweat, and wipes clean far easier; plus, I tend to take better care of these so I'm less likely to break them casually, though to be fair I could have done that with the $10 glasses if I'd wanted to.  But I still worry I could easily bend or break them; the frames are light and would bend easily.

The real proof of the pudding will be if, six months from now, these are still scratch-free (glass is far, far more scratch-resistant than the plastic of cheap sunglasses), unbroken, and clear of vision.