What is the base curve (BC) lens sunglasses and what is toric lens?
I often see ads in sunglasses: "Turn base 8" "Curve 10 base x 4.5" "Toric Lens".?What does this mean??What is the base curve??What this impacts on the lens??A sunglasses can be better or worse depending on the base curve?
Related Topics : Sunglasses
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