What does astigmatism mean?

Definitions for astigmatism
əˈstɪg məˌtɪz əm; əˈstɪg mi əastig·ma·tism

Here are all the possible meanings and translations of the word astigmatism.

Princeton's WordNet

  1. astigmatism, astigmia(noun)

    (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people

  2. astigmatism, astigmia(noun)

    (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point

Wiktionary

  1. astigmatism(Noun)

    A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred.

  2. astigmatism(Noun)

    A disorder of the vision, usually due to a misshapen cornea, such that light does not focus correctly on the retina causing a blurred image.

  3. Origin: From a- + stem of

Webster Dictionary

  1. Astigmatism(noun)

    a defect of the eye or of a lens, in consequence of which the rays derived from one point are not brought to a single focal point, thus causing imperfect images or indistinctness of vision

  2. Origin: [Gr. 'a priv. + , , a prick of a pointed instrument, a spot, fr. to prick: cf. F. astigmatisme.]

Freebase

  1. Astigmatism

    An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp focus at two different distances. The term comes from the Greek α- meaning "without" and στίγμα, "a mark, spot, puncture".

Chambers 20th Century Dictionary

  1. Astigmatism

    a-stig′ma-tizm, n. a defective condition of the eye, in which rays proceeding to the eye from one point are not correctly brought to a focus at one point.—adj. Astigmat′ic. [Gr. a, neg., and stigma, stigmat-os, a point.]

U.S. National Library of Medicine

  1. Astigmatism

    Unequal curvature of the refractive surfaces of the eye. Thus a point source of light cannot be brought to a point focus on the retina but is spread over a more or less diffuse area. This results from the radius of curvature in one plane being longer or shorter than the radius at right angles to it. (Dorland, 27th ed)

How to pronounce astigmatism?

  1. Alex
    Alex
    US English
    Daniel
    Daniel
    British
    Karen
    Karen
    Australian
    Veena
    Veena
    Indian

How to say astigmatism in sign language?

  1. astigmatism

Numerology

  1. Chaldean Numerology

    The numerical value of astigmatism in Chaldean Numerology is: 2

  2. Pythagorean Numerology

    The numerical value of astigmatism in Pythagorean Numerology is: 5

Examples of astigmatism in a Sentence

  1. Jessica Sinclair:

    We started to notice that she was having issues reaching her milestone of crawling, so at her regular pediatric check they did an eye screening and saw that she might have had a slight astigmatism.

Images & Illustrations of astigmatism

  1. astigmatismastigmatismastigmatismastigmatismastigmatism

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Translations for astigmatism

From our Multilingual Translation Dictionary

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"astigmatism." Definitions.net. STANDS4 LLC, 2020. Web. 5 Apr. 2020. <https://www.definitions.net/definition/astigmatism>.

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