I've seen on a few sites rules about using full seal eye pro, but that is about it. SOme sites state they will test shot any eye pro they do not think/know if safe. So if you turn up with a pair that is not common, be prepared to get them test shot.
From what I have learned, frames and lenses are rated independently when it comes to goggles. Glasses (with no head band/strap) can only ever be rated F - no higher. To get a higher rating, the frames must have a strap.
Cheap protection found on ebay may have F rated lenses, but not have F rated frames, which is why the lens pops out when shot.
Source :
http://www.safetyspecs.co.uk/BS EN 166.htm
Personally I wouldn't trust mesh to protect my eyes. I've had bb's shatter on my face mask, and yes, no damage done to my face/teeth, but the thought of the shrapnel going into my eyes freaks me out.