Original: Significant amounts are also used in the production of polycarbonates via its reaction with bisphenol A. Polycarbonates are an important class of engineering thermoplastic found , for example , in lenses in eye glasses .
Simplified: Polycarbonate is produced from its reaction with bisphenol A. Polycarbonates are an important class of engineering thermoplastic . They can be found in lenses in eye glasses .