Lens coatings are used not only to boost light transmission, but also to filter light. Lenses coated to reflect ultraviolet light are commonly used in eyeglasses and sunglasses. It is also possible to create coatings that allow light of only a specific wavelength to pass through, and reflect all other wavelengths. In video cameras, light is first split into RGB elements (red, green and blue) before being converted into electrical signals to form an image. This splitting of light is accomplished by lens coatings that permit only light of the required red, green and blue wavelengths through.