Also, one downside to wearing glasses all the time is it made my eyes more sensetive to light, so I pretty much need to wear sunglasses most the time. I have some dark shades and some lighter ones, and I often wear the lighter ones on rainy days or if I go out toward dusk. It helps immensely to buy some good quality shades. I personally really like the arnette catfish.
I see a few KHZ into the Ultra-Violet, makes a high UV day like welding with no shield almost.. My lens have a little something "special" but I can get them in a normal sunglass len, I would just have to maybe buy them from a Optical shop.