How are Smiths polarized lenses constructed?
Smith’s polarized lenses are constructed of a sheet of film that is sandwiched between two pieces of lens material. We then add layers of anti-scratch protection, multi-layer mirror coating, and a hydrophobic coating that will repel water and moisture. The PVA film molecule alignment is such that it allows only vertical light waves to pass through the lens (somewhat like a venetian blind), thus eliminating glare. Cheap polarized lenses do not use these materials and can cause distortion in your vision, which may eventually lead to headaches.
