http://hdforums.com.au/Users/Files/7774/249103676-As-1609-1981-Eye-Protectors-for-Motor-Cyclists-and-Racing-Car-Drivers-PDF-Personal-Use.pdf

Quite a bit of literature there, be nice if it was condensed into a paragraph or two.
I am all for eye protection, be nothing worse than losing an eye.
Well maybe your balls, or your life, but eyes are pretty handy.
Was a tad disgruntled after buying a Shark open face helmet with screen recently and reading the fine print after I bought it that the screen is not guaranteed shatterproof.
Heck!, last time I was in the U.S where you did not need a helmet you still had to have eye protection. It makes sense.

I see a lot of sunnies rated low impact (if any at all) which is utter BS for anything that's supposed to be for motorcycle use.  I usually ride with a pair of Fuglies SAS
now, but I'd be interested to hear of others that aren't shit.