A polarization filter is a device that allows light waves of a specific orientation to pass through while blocking others. This filter is commonly used in photography to reduce glare from surfaces like water or glass, enhancing color saturation and contrast in images. In addition to photography, polarization filters are also used in various applications, including sunglasses to reduce glare and improve visibility, and in LCD screens to control light transmission. By selectively filtering light, these devices help improve visual clarity and reduce unwanted reflections.