I remember learning that plastic photochromic lenses become more effective (darker, quicker) when coated with AR, and, based on my experience, I believe this to be true. The reason, I was taught, is that, since AR allows more light to contact or penetrate the lens, then an AR photochromic will obviously receive more light to activate the transitional process. So far, so good, except: Aren't light-sensitive lenses activated by ultraviolet light? Does an anti-reflective coating really allow more UV to reach the lens, or is there some other explanation for the improved darkening? Thanks for your help, somebody!
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