Polycarbonate Lenses Nowadays, choosing a pair of eyeglasses is about more than just style. You also need to consider the material your lenses are made from. Lens material is normally glass, plastic, or polycarbonate. Here’s what you need to know about polycarbonate and the benefits of polycarbonate lenses for eyeglasses. What is Polycarbonate? Polycarbonate is a specific type of plastic.