How does that work tho, as for the Viper glasses, how do you get the presciption lenses in? You simply go to the opticians ((there where you got your normal glasses)) and they put it in or do you take of the ones from your normal glasses and place it inside them? ((sorry have no idea how it works)) If so I think that would cost better and look better then buying them big goggles! If it works like that I might buy them beside them goggles.
I as well seen some videos ((from scoutthedoggie if i spelled it right)) seen a guy with viper styled glasses and under that normal prescription glasses.