When your on the battlefield or in camp, shades need to come off.
  
 I know that!  But while riding in the battle scene I had to wear my photo grays.  If I took them off I'd be blind as a bat!  Most of the guys who participate in those battle scenes wear their glasses.  They don't get that technical here.  Some take to wearing period style glasses, but most don't.  I have heard that for those big reenactments down South and for the Gettysberg reenactment they get real sticky about glasses. But what is a person supposed to do?  Ya gotta see things!