permanent lens.
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permanent lens. — See intraocular lens … Useful english dictionary
intraocular lens — noun an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed • Hypernyms: ↑lens, ↑lense, ↑lens system * * * Ophthalm. a plastic lens implanted surgically to replace… … Useful english dictionary
intraocular lens — Ophthalm. a plastic lens implanted surgically to replace the eye s natural crystalline lens, usually because the natural lens has developed a cataract. Also called permanent lens. Cf. contact lens. * * * … Universalium
History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… … Wikipedia
Canon FD 200 mm lens — Eight designs of Canon FD 200 mm lens were produced for the Canon FD lens mount. These spanned two generations (FD and New FD) and varied by aperture and macro ability. These photographic lenses were: Canon FD * 200 mm f/2.8 S.S.C.: This lens,… … Wikipedia
Louvre-Lens — The Louvre Lens is a new museum due to open in 2010 in the industrial French city of Lens, Pas de Calais.OriginSince many of the works in the Louvre are viewed only in distinct departments for example, French Painting, Near Eastern Art or… … Wikipedia
Field lens — Field Field (f[=e]ld), n. [OE. feld, fild, AS. feld; akin to D. veld, G. feld, Sw. f[ a]lt, Dan. felt, Icel. fold field of grass, AS. folde earth, land, ground, OS. folda.] 1. Cleared land; land suitable for tillage or pasture; cultivated ground; … The Collaborative International Dictionary of English
Photography — is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light sensitive material such as photographic… … Wikipedia
photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… … Universalium
eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… … Universalium
