3D viewing refers to the technology that allows users to see images or videos in three dimensions, creating a sense of depth and realism. This is achieved through various methods, such as using special glasses or screens that display slightly different images to each eye, mimicking how humans perceive depth in the real world. Common applications of 3D viewing include movies, video games, and virtual reality experiences. Devices like 3D TVs and VR headsets are designed to enhance this experience, making it more immersive. The technology is also used in fields like medicine and architecture for better visualization of complex structures.