Movie theaters predominantly use polarized glasses for 3D movie screenings. These glasses work by filtering light waves in a way that allows only one direction of light to pass through, which is essential for creating the 3D effect. The use of polarized glasses is widespread due to their effectiveness in separating the left and right eye images, which are projected onto the screen with slightly different orientations. According to a report by the International 3D & Advanced Imaging Society, as of 2020, over 90% of all 3D movie screenings in the United States utilized polarized glasses. This technology ensures that viewers experience a seamless and immersive 3D experience without the discomfort often associated with other types of 3D glasses.