Well, this pretty much turns everything we've been told on its head. Takeaways: 1) nearly all prescription clear eyeglasses today have UV protection built in and are 100% as effective as any tinted sunglass. 2) it is healthy to NOT wear sunglasses for 2-3 hours or more each day.
Interesting point that we, as a species, have been walking around for millions of years without sunglasses and did not go blind
