What is a plastic polymer?

A plastic polymer is a material formed by linking together long chains of molecules through a process called polymerization. This process creates a new material that has unique properties compared to the individual monomers used to create it. In the context of contact lenses, the materials utilized often involve polymers that can be modified to achieve desired characteristics such as flexibility, oxygen permeability, and moisture retention.

The choice indicating that a plastic polymer is a blend of materials created by linking molecules of different chemical substances accurately describes the fundamental nature of polymers. This definition encompasses both the structure and formation of polymers, emphasizing their versatility and importance in various applications, including contact lenses.

While some other options present incorrect concepts, they do not align with the scientific definition or the context of polymeric materials, particularly in relation to contact lenses. Focusing on the molecular architecture and characteristics of polymers provides a solid foundation for understanding their application in this field.