Virtual reality uses headsets to fully immerse users in simulated 3D worlds, replacing the real world. Augmented reality enhances the real world by overlaying digital images and information. While VR aims to create separate virtual worlds, AR enhances the real world experience by supplementing it with computer-generated perceptual information. Major applications of AR include gaming, navigation, design, marketing, and retail by allowing users to visualize products in their real-world environment through their device cameras.