Whether you’re watching a cheesy 3-D classic through the old-fashioned red-and-blue glasses or a modern blockbuster through a sleek pair of high-tech shades, the 3-D effect relies on the supercomputer between your ears. Both types of glasses filter out individual images for each eye so that your brain can process the differences and perceive the illusion of depth.
When a viewer puts on special glasses, the lens over the left eye sees one image, while the right eye sees the other image. As the needed left and right images reach each eye via the needed 3D glasses, a signal is sent to the brain, which combines the two images into a single image with 3D characteristics.
Picture Credit : Google
