These replacement lenses for my Det Cord Oakley sunglasses came on easily after a little effort and kept them looking like new and had good color and polarization passed through them were seen through. But if you don't handle them carefully, it's very easy to scratch. I had original lenses for 1.5 years before deciding to replace them due to scratches. They lasted about three months before I decided to replace these lenses due to scratches. I don't spoil my glasses, I seem to drop them at least once a day. I don't sprinkle them, although on purpose. It's pretty cheap to replace I think compared to finding and buying original lenses.
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