
I recently purchased Alphax Silver Titanium polarized replacement lenses for my Costa Del Mar Blackfin sunglasses. Installation was easy and the lenses looked smooth in my frame. Although the polarization effectively reduced glare, the lenses weren't as sharp as my original Costa del Mar lenses. The colors of the surrounding world seemed a bit muted and less bright. I also noticed some distortion around the edges of the lenses, which was a bit disconcerting. While there are some advantages to Alphax lenses, overall I think I will be using original Costa Del Mar lenses in the future.

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