3D technology has come a long way since Wheatstone developed his stereoscope, then used to view static images and eventually pictures. Now we get to wear 3D glasses and enjoy 3D films, television shows and video games. How does all this work. 3D or stereoscopy refers to how your eyes and brain create the impression of a third dimension. Human eyes are approximately 50mm to 75mm apart – accordingly, each eye sees a slightly different part of the world. It is pretty easy for your brain to figure out the disparity between two images. Your brain can automatically figure our all the angels and math and geometry to sync the images.