The viewer wears polarized glasses that filter the incoming light such that each eye sees only the appropriate image. For example, the system might present the left eye with a vertically polarized image, and the right with a horizontally polarized one. The brain automatically knits these slightly different pictures together into a 3D image.
觀眾觀看時再戴著同樣原理（左邊眼鏡會「濾掉」水平光、右邊則相反）的偏光眼鏡，如此一來，左右眼就能各自接收不同畫面，並在腦中自動合成立體影像。