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Should You Buy CR-39 Lenses Instead of Polycarbonate? - Endmyopia® - The Reduced Lens Method™: Improve Eyesight Naturally
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Warby Parker 1.67 high index on top, VSP polycarbonate on bottom. -6.25. Paid cash for the Warby Parker and still paid less than what I paid after insurance for the VSP pair. :
High Index Lenses Vs Polycarbonate | Blog | Eyebuydirect
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Eyecare Plus - A high index lens is a lens that has a higher "index" of refraction. Meaning it has a greater ability to bend light rays to provide clear vision for
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