How do the 3D Glasses work?
In order to simulate depth when playing video games or watching a movie,
each of your eyes must see a slightly different image (see A and
B below). The two different Right Eye and Left Eye images are presented
together via the odd and even horizontal lines of your TV or PC monitor.
Without the glasses, you would see a blurry double view of both images,
one on top of the other (see Image C below).
Photos A and B below were taken simultaneously with a Stereoscopic camera. The camera
has two lenses, side by side, which simulate human vision. Notice the shift in position
of the images, foreground to background. This is because of the difference
in perspective of each of the camera's left and right lenses. Image C
shows a close up of the two views merged together using the odd and even
horizintal lines of a computer monitor.