Summarize this article in one sentence.
Ultraviolet light is invisible to the human eye, but a UV lens filter can access this light, which will eliminate some haziness. When using filters in photography, the UV lens will protect the surface of your lenses from scratches. The UV lens filter provides another layer of protection between your camera and your lens.

Summary:
Use UV filters to sharpen an image by reducing haziness. Fasten an ultraviolet lens to all your lenses. Connect an ultraviolet filter to guard your lenses from dust.