Polarized glasses are also known as passive glasses because they do not require any battery power in order to operate them. Each lens is polarized in the opposite direction, allowing an image to be filtered out. For those who didn’t learn it or remember it from high school physics, essentially one image is completely blocked out by turning the lens on direction. When turn another direction the image is completely visible.
Polarized lenses allow both the right and left images of the program to be displayed simulatneously. The right eye only sees what is meant for it and the left eye only sees what is meant for it. Anyone who is watching the program without glasses would see an image that is slightly blurred because of the two images being displayed at the same time.
While polarized glasses require no power and do not need to be synchronized with a television, they are not in wisespread use with televisions yet. While movie theaters use them routinely, a television would require the screen to be polarized as well. For larger 3D TV’s this would be very expensive.
