Lens

A lens can be:
*Lens (optics), an optical element. See also :Category:Lenses, and:
**Lens (anatomy), a part of the eye
**Corrective lens for vision correction.
**Photographic lens, a special type of lens used in a camera. See also :Category:Photographic lenses.
**Sunglasses' lenses, which are light-attenuating elements
**Hence:
***Gravitational lens, an astronomical effect
***Electrostatic lens, a device used to focus or collimate electron beams
*** a metaphor for a point of view
***a science-fictional alien device in E. E. Smith's Lensman series, which gives its bearer telepathic and other abilities
*Lens (genus), the genus of the lentil plant
*Lens (geometry), a geometric shape formed from two arcs

There are also places called Lens:
*Lens, Pas-de-Calais, France
**RC Lens, its football (soccer) club
*Lens, Belgium
*Lens, Valais, Switzerland

People named Lens include:
*Louis Lens, Flemish rose breeder

LENS can be an abbreviation for:
*Laser Engineered Net Shaping, a rapid prototyping technology capable of building fully-dense metal parts