"In polarized sunglasses, a special filter is used that helps in eliminating the reflected light of high intensity or glare. In other terms, this polarized filter allows passing only a portion of light having wavelengths that are not aligned with the particles of the filter. Speaking about the composition of polarized filters, they are made up of chemical compound coated on a transparent glass or plastic lens. The chemical film consisted of tiny molecules that align in a parallel fashion with respect to one another. If the chemical film is coated uniformly on the lens, the molecules absorb the entry of all light intensities that matches their alignment. Since glares are mostly caused by the horizontally oriented light waves, polarized sunglasses are designed in such a way that they allow passing of only vertical polarized light. With such polarized sunglasses, the texture and shape of objects become more clear, irrespective of the glare. This way, polarized lens reduces the glare effect. One of the drawbacks of polarized sunglasses is that liquid crystal displays (LCD's) may not be visible while viewing at specific angles.
