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.