PMMA, or polymethyl methacrylate, is a transparent thermoplastic polymer also known by the trade names Plexiglas, Lucite, Acrylite, Perspex, and others. This material is commonly used in a wide variety of applications, such as eyeglass lenses, transparent airplane domes, protective barriers, light signs, lighting components, and more. Its transparency, recyclability, and ease of processing make it a popular choice for decorative and functional elements in architecture and design.