lens : Idioms & Phrases

• noun a lens implant containing a hinge that allows for both near and far vision (thus mimicking the natural lens of a young person)
  accommodating IOL.
  

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• noun a compound lens system that forms an image free from chromatic aberration
  

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• (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed.

Webster 1913

• noun a lens designed to correct astigmatism
  

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• . (Anat.) See Eye.

Webster 1913

• the straight line passing through its center and perpendicular to its surfaces.

Webster 1913

• noun a lens that focuses the image in a camera
  camera lens.
  

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• noun a photographic lens with a short focal length used to take pictures at short ranges
  

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• (Optics), a lens used for producing parallel rays of light.

Webster 1913

• noun a lens system consisting of two or more lenses on the same axis
  

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• noun a lens such that a parallel beam of light passing through it is caused to diverge or spread out
  concave lens.
  

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• noun a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
  contact.
  

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• noun lens such that a beam of light passing through it is brought to a point or focus
  converging lens.
  

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• noun lens such that a beam of light passing through it is brought to a point or focus
  converging lens.
  

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• (Opt.), a double-convex lens with one radius equal to six times the other.

Webster 1913

• noun a lens made of optical crown glass
  

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• noun biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina
  lens; crystalline lens.
  

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• . (Anat.) See Eye.
• (Anat.), the capsular lenslike body in the eye, serving to focus the rays of light. It consists of rodlike cells derived from the external embryonic epithelium.

Webster 1913

• a lens having one, or more than one, cylindrical surface.

Webster 1913

• noun a lens such that a parallel beam of light passing through it is caused to diverge or spread out
  concave lens.
  

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• (Optics), a large lens constructed in several parts or layers, extending in a succession of annular rings beyond the central lens; used in lighthouses.

Webster 1913

• noun electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons
  lens.
  

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• noun the lens that is farthest from the eye in an optical device with more than one lens
  

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• (Optics), that one of the two lenses forming the eyepiece of an astronomical telescope or compound microscope which is nearer the object glass; called also field glass.

Webster 1913

• noun a camera lens having a wider than normal angle of view (and usually a short focal length); produces an image that is foreshortened in the center and increasingly distorted in the periphery
  fisheye lens.
  

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• (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center.

Webster 1913

• noun lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
  

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• (Opt.), a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; so called from the inventor.

Webster 1913

• noun genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils
  Lens.
  

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• a microscopic objective of short focal distance designed to work with a drop of liquid, as oil, between the front lens and the slide, so that this lens is practically immersed.

Webster 1913

• noun a clear plastic lens that is implanted in the eye; usually done when the natural lens has been removed in a cataract operation
  IOL; interocular lens implant.
  

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• 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
  

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• noun cap used to keep lens free of dust when not in use
  lens cap.
  

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• noun a tenuous mesoblastic membrane surrounding the lens of the eye
  

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• noun the tissue that surrounds the lens nucleus
  cortex.
  

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• noun cap used to keep lens free of dust when not in use
  lens cap.
  

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• noun widely cultivated Eurasian annual herb grown for its edible flattened seeds that are cooked like peas and also ground into meal and for its leafy stalks that are used as fodder
  lentil; lentil plant.
  

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• noun a tubular attachment used to keep stray light out of the lens of a camera
  hood.
  

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• noun a clear plastic lens that is implanted in the eye; usually done when the natural lens has been removed in a cataract operation
  IOL; interocular lens implant.
  

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• noun a worker who makes glasses for remedying defects of vision
  optician.
  

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• noun the central structure of the lens that is surrounded by the cortex
  nucleus.
  

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• noun biconvex transparent body situated behind the iris in the eye; its role (along with the cornea) is to focuses light on the retina
  lens; crystalline lens.
  

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• noun a transparent optical device used to converge or diverge transmitted light and to form images
  lens; lense.
  

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• noun a lens with a single focus that is used after cataract surgery to provide clear distance vision
  monofocal IOL.
  

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• noun a type of lens implant that contains several rings with a common center and adjusts for near or far vision; the eye is in focus for near and far vision simultaneously
  multifocal IOL.
  

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• (Opt.), a lens one side of which is plane and the other convex, but made up of a number of plane faces inclined to one another, each of which presents a separate image of the object viewed through it, so that the object is, as it were, multiplied.

Webster 1913

• . (Opt.) See under Lens.

Webster 1913

• noun the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
  objective; object glass; object lens.
  

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• noun the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
  objective; object glass; object lens.
  

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• noun a lens that focuses the image in a camera
  camera lens.
  

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• (Opt.), the point where the principal axis meets the surface.

Webster 1913

• . See Polyzonal.
• (Opt.), a lens made up of pieces arranged zones or rings, used in the lanterns of lighthouses.

Webster 1913

• noun a compound camera lens with a relatively high aperture
  

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• (Microscopy), a condensing lens in which the light is confined to an annular pencil by means of a small, round diaphragm (the spot), and used in dark-field ilumination; called also spotted lens.

Webster 1913

• noun a camera lens that magnifies the image
  telephoto lens.
  

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• noun a camera lens having a wider than normal angle of view (and usually a short focal length); produces an image that is foreshortened in the center and increasingly distorted in the periphery
  fisheye lens.
  

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• noun a camera lens that magnifies the image
  telephoto lens.
  

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