Active shutter 3D is a technology used to create three-dimensional images by alternating the view seen by each eye. It employs special glasses equipped with liquid crystal lenses that rapidly open and close in sync with the display. This synchronization allows each eye to see a different image, creating the illusion of depth. The system typically requires a compatible display, such as a 3D television or computer monitor, which alternates between two images at a high refresh rate. Active shutter 3D is commonly used in cinemas and home entertainment systems to enhance the viewing experience with immersive visuals.