Window films help absorb solar heat and light reducing the risks of skin cancer and impaired vision. So far as fading is concerned, the window films substantially reduce fading by blocking 99% of UV rays of the Sun. No window film can completely reduce fading.
Marine Solar Film
The window film, depending on which type it is, can reduce the view from the outside of an automotive vehicle into the inside. The reverse however is not true. The human eye inside the vehicle will adjust to the light it received through the glass window and view the outside perfectly well.