A 3D monitor is a display device that creates the illusion of depth, allowing viewers to see images in three dimensions. This technology enhances the viewing experience for movies, video games, and simulations by making them appear more lifelike. 3D monitors typically require special glasses or use advanced techniques like autostereoscopy to deliver the 3D effect without additional accessories. These monitors work by presenting slightly different images to each eye, mimicking how humans perceive depth in the real world. They are commonly used in various fields, including entertainment, design, and medical imaging, where a realistic representation of objects is crucial for analysis and enjoyment.