I always let my eye doctor shill the UV coating on my glasses when I get new ones every couple of years. (Ordinary glasses, I mean, not sunglasses.) What the heck, I figure, might as well try to save my retinas as a gift to myself for when I turn 65, especially since he “definitely recommends” them.
So I’m at a museum in San Diego last year which has a UV detector exhibit, demonstrating how much UV is screened out by different types of sunglasses. The exhibit has a UV “gun” aimed at a detector, and you can spin a wheel to interpose different types of sunglasses (and ordinary eyeglasses) between the gun and the detector. (Cecil, make a field trip to the museums, they’re right by the Zoo, you must have a backlog of UV research and animal research you’ll be able to conduct in a day if you work at it.)
The wheel has 5 types of glasses mounted in it, and also an empty slot. What an opportunity! I shout, and throw my glasses into the wheel. To my shock, the glasses reduced the UV by maybe 3% or 5%.
I went and bitched to the poor doctor’s aide but nothing ever came of it. All of ya’s, you’re paying for nothing when you pay extra for the UV protection!