Soft contact lenses are made from which one of the following materials?: (A) Poly ethyl methaacrylate, (B) Hydroxy ethyl methacrylate, (C) Silicon, (D) Glass
Answer is B. Hydroxy ethyl methaacrylate is a soft, flexible, water-absorbing, plastic used to make soft contact lenses. It is a polymer of 2-hydroxyethyl methacrylate (HEMA), a clear liquid component. Hard contact lenses are made from polymethyl methacrylate (PMMA) and Silicon.