An object, usually made of glass, that focuses or defocuses the light that passes through it. / A device which focuses or defocuses electron beams.

(transitive, cinematography) To film, shoot. / (geology) To become thinner towards the edges.

A municipality in Hainaut, Belgium. / A commune in Pas-de-Calais department, Hauts-de-France, France. / A municipality in Valais canton, Switzerland.

A diminutive of the male given name Leonard.

plural of Lenning

A surname.

A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically.

(photography) A lens containing a mechanical assembly of inner lenses, allowing the focal length to be changed rapidly.

(optics) A lens having at least one convex surface, such that light passing through it may be brought to a focus.

(optics) A lens generally composed of two separate lenses, one convex and one concave and generally of different materials, in such a way that the chromatic aberration produced by one is corrected by the other.