lens

Noun
  1. A transparent optical device used to converge or diverge transmitted light and to form images (synset 103661810)
    is a type of: optical device - a device for producing or controlling light
    subtypes:
    • anastigmat - compound lens or lens system designed to be free of astigmatism and able to form approximately point images
    • anastigmatic lens - a lens designed to correct astigmatism
    • camera lens, optical lens - a lens that focuses the image in a camera
    • compound lens - a lens system consisting of two or more lenses on the same axis
    • condenser, optical condenser - lens used to concentrate light on an object
    • contact, contact lens - a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
    • converging lens, convex lens - lens such that a beam of light passing through it is brought to a point or focus
    • crown lens - a lens made of optical crown glass
    • concave lens, diverging lens - a lens such that a parallel beam of light passing through it is caused to diverge or spread out
    • eyepiece, ocular - combination of lenses at the viewing end of optical instruments
    • field lens - the lens that is farthest from the eye in an optical device with more than one lens
    • fresnel lens - lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
    • intraocular lens - 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
    • meniscus - (optics) a lens that is concave on one side and convex on the other
    • eyeglass, monocle - lens for correcting defective vision in one eye; held in place by facial muscles
    • object glass, object lens, objective, objective lens - the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
    is a part of: optical instrument - an instrument designed to aid vision
    same as: lens system, lense
  2. Genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils (synset 112564532)
    is a type of: rosid dicot genus - a genus of dicotyledonous plants
    belongs to: papilionoideae, subfamily papilionoideae - alternative name used in some classification systems for the family Papilionaceae
    same as: genus lens
  3. (metaphor) a channel through which something can be seen or understood (synset 106271713)
    "the writer is the lens through which history can be seen"
    domain usage: figure, figure of speech, image, trope - language used in a figurative or nonliteral sense
    is a type of: channel, communication channel, line - (often plural) a means of communication or access
  4. Biconvex transparent body situated behind the iris in the eye;
    Its role (along with the cornea) is to focus light on the retina (synset 105327912)
    is a type of: organ - a fully differentiated structural and functional unit in an animal that is specialized for some particular function
    has:
    is a part of: eye, oculus, optic - the organ of sight
    same as: crystalline lens, lens of the eye
  5. Electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons (synset 103662283)
    is a type of: electronic equipment - equipment that involves the controlled conduction of electrons (especially in a gas or vacuum or semiconductor)
    same as: electron lens

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