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Trivex is the first tri-performance lens material; meaning it offers a triple combination of features never before found in a single material. This breakthrough in technology is specifically designed to deliver the most comprehensive performance of any lens material. It is very similar to Polycarbonate in its shatter resistance, but provides better optics, making it a good alternative. Trivex with a 1.0 center thickness is as impact resistant as Polycarbonate with a 1.5 center thickness, thus making the lens thinner in most cases.