Matches my frames perfectly. Much better than the Revant replacements I've used. The optical quality is normal. I think Revant had a slight advantage in this area. Revant lenses also had better polarization. You are polarized. The lenses are thicker than Revant lenses, which is another benefit of Seek. I'll add this later to see how they wear compared to the Revants. EDIT: They were good for about 10 months before wearing lenses became visually disturbing. Lens coating is not very difficult. For the money I'm happy with them. They're still better than the Revenants I had before.
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