So why Real Glass for your Lenses:
Real Glass offers some unique characteristics over plastic such as typically being highly scratch resistant, so no matter how you choose to clean them, shirttail, sweater or towel, you’re good to go. Remember getting your last pair of glasses and being warned to only used approve eyeglass cleaner, well real glass is immune to most household cleaning agents. Glass offers excellent optical quality when compared to plastic lenses, you see very clearly with a glass lens! Glass lenses also can also be thinner than plastic, and for most people, thinner is better.