A polarized lens in one that allows or blocks the passage of light through it based on the orientation in space of the wave. Let's look at a light wave and kick things around a bit. Light is composed of an electric wave and a magnetic wave. (Both.) The waves move in phase, but are at right angles to each other. If a light wave with the electric field moving "up and down" and the magnetic field moving "left and right" is along side another light wave with the electric field moving "left and right" and the magnetic field moving "up and down" instead, the two waves are of opposite polarity. The waves are polarized 90 degrees out from each other. With the light rays in the above example moving through a polarized lens that is set for one of them, it will block the other. If the lens is rotated 90 degrees, it will then pass the one it previously blocked, and will block the one it previously passed. Use the links below to relevant posts and you can gather more data.