Augmented reality enhances one's current perception of reality by superimposing computer-generated images over a user's view of the real world. The goal of AR is to enhance performance and perception while making it difficult to distinguish between real and virtual elements. AR works by adding virtual objects to real world scenes and potentially removing real world objects. Key components include devices that can project virtual enhancements onto the real world. Applications span industries like aviation, business, education, and healthcare. While AR augments reality, virtual reality aims to replace it with a fully immersive computer-generated environment. AR may become widely used in daily life through new interaction interfaces.