LENSES: Material Performance Lens Materials Are Changing: Are You Ahead of the Curve? By Johnna Dukes, ABOC Wednesday, May 21, 2014 11:00 AM Glass, Polycarbonate, CR-39, Trivex, 1.60... So many lenses, so little time! Do you ever find yourself overwhelmed by the amount of lens material options available on today's market? You must sign in to see the full article.