Originally Posted by ItsJustMe

I haven't tried it yet, but I'm going to order one of these next time I order stuff:
http://www.nashbar.com/nashbar_photos/medium/LG-WS.gif
Louis Garneau wind screen-velcro's to your helmet.

Personally I just wipe the front of my glasses with the terry on the thumb of my gloves. Might scratch though. My glasses have a Crizal coating so they pretty much don't scratch. If it's raining heavily I do have to wipe the backs occasionally; a pass of my finger usually does it. Maybe a visor'd helmet would help there. My next helmet will have a visor.