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Iridium is a stable metal that chemically unreactive, like platinum and gold. Iridium is the most resistant to oxidation of all metals. It can be used is as a hardening agent in alloys with Platinum and Osmium. Sometimes used in medical therapies e.g. treating prostate cancer by radiation therapy.
Answers. Best Answer: Iridium means it has the reflective coating. Generally speaking, few if any lenses that lack the iridium coating keep people from seeing your eyes. However, not every single lens with an iridium coating has one that's strong enough to 100% block your eyes.