http://www.ncbi.nlm.nih.gov/pubmed/15302349 and there are others.
Now, here's my take. Back in the 70s-80s, we started talking about UV exposure and cataract formation. There are still folks out there that believe it's a scam. Most of us decided that the prudent step was to at least offer the option of UV protection. A generation later and UV absorptive lenses are the rule rather than the exception. I believe that while the jury may still be out, to ignore or to choose to not offer the option of protection is less than prudent. After all is said and done, it's your patient's vision and choice, not yours.
24 hours later, I am satisfied with my lenses. My next pair will be the sun (outdoor) option since I prefer a brown polarized lens already.
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