Similar to a scratch-resistant coating , AR is made of a very hard thin film that is layered on the lens. It is made of material that has an index of refraction that is somewhere between air and glass. This causes the intensity of the light reflected from the inner surface and the light reflected from the outer surface of the film to be nearly equal. When applied in a thickness of about a quarter of light's wavelength, the two reflections from each side of the film basically cancel each other out through destructive interference, minimizing the glare you see. Tinted - The color of the tint determines the parts of the light spectrum that are absorbed by the lenses.
Manufacturers use different colors to produce specific results.
Click here for more information on tinting. Polarized - Polarized filters are most commonly made of a chemical film applied to a transparent plastic or glass surface. The chemical compound used will typically be composed of molecules that naturally align in parallel relation to one another. When applied uniformly to the lens, the molecules create a microscopic filter that blocks any light not matching their alignment. Click here for more information on polarizing.