The Invisible Magic: How Optical Coating Shapes The Clear World in Your AR Glasses This paper examines the role and challenges of advanced optical films in enhancing display performance for smart AR glasses. Through an analysis of industry developments and technical literature, it highlights how these components are crucial for managing core trade-offs such as field of view, brightness, and device weight. The study finds that while optical films enable slimmer and more efficient designs, they also present significant manufacturing and integration hurdles. The conclusion underscores that the evolution of optical film technology is vital for overcoming current barriers to the widespread adoption of consumer AR glasses.