Glad I found these lenses to upgrade my old Oakley XX sunglasses. The lenses fit perfectly and snap directly into the frame. The lenses look very similar to the original Oakley lenses and the vision through them is quite good. One downside I notice is that when I look through some of the car's side or rear windows, I see some distortion. The distortion is best described by seeing the pattern as lines or dots in the car windows. The distortion isn't that bad, I could get used to that. My original Oakley lenses didn't have such distortion. But Walleva lenses are $20 if you want to keep your old Oakley XX sunglasses alive. In the 4/23/18 update I found that the distortion I described in my original review is due to the polarization of the lenses and looking through the toughened safety glass of cars. This is not a defect in the lenses.
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