Main Page | See live article | Alphabetical index A lens is an optical device: Lens Lens is the genus name of the lentil. Lens is also a city in France and a municipality in Belgium: Lens, France Lens, Belgium In E. E. Smith's Lensman fiction, a lens is an alien device that gives its bearer telepathic and other abilities. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.