What company is known for introducing CR-39 lenses?

The company that is known for introducing CR-39 lenses is PPG Industries. In the 1940s, PPG developed CR-39, which is a type of plastic polymer that is lightweight and provides excellent optical clarity. This material became widely popular for use in eyeglass lenses due to its durability and scratch resistance compared to glass lenses. The introduction of CR-39 lenses revolutionized the eyewear industry by offering a more comfortable and practical option for consumers, leading to their widespread adoption in the years that followed. This innovation by PPG Industries has had a lasting impact on the design and manufacturing of prescription eyewear.