What does astigmatic mean?

Definitions for astigmatic
ˌæs tɪgˈmæt ɪkastig·mat·ic

This dictionary definitions page includes all the possible meanings, example usage and translations of the word astigmatic.

Princeton's WordNet

  1. astigmaticadjective

    of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images


  1. astigmaticadjective

    suffering from astigmatism

  2. Etymology: From astigmatism


  1. astigmatic

    Astigmatism is a type of refractive error due to rotational asymmetry in the eye's refractive power. This results in distorted or blurred vision at any distance. Other symptoms can include eyestrain, headaches, and trouble driving at night. Astigmatism often occurs at birth and can change or develop later in life. If it occurs in early life and is left untreated, it may result in amblyopia.The cause of astigmatism is unclear; however, it is believed to be partly related to genetic factors. The underlying mechanism involves an irregular curvature of the cornea and protective reaction changes in the lens of the eye, called lens astigmatism, that has the same mechanism as spasm of accommodation. Diagnosis is by an eye examination called autorefractor keratometry (objective, allows to see lens and cornea components of astigmatism) and subjective refraction, but subjective methods are almost always inaccurate, if lens astigmatism is not fully removed first with a week of eye drops.Three treatment options are available: glasses, contact lenses, and surgery. Glasses are the simplest. Contact lenses can provide a wider field of vision and less artifacts than even double aspheric lenses. Refractive surgery permanently changes the shape of the eye and thereby cures astigmatism.In Europe and Asia, astigmatism affects between 30 and 60% of adults. People of all ages can be affected by astigmatism. Astigmatism was first reported by Thomas Young in 1801.


  1. astigmatic

    Astigmatic refers to a type of visual impairment known as astigmatism, in which light fails to come to a single focus on the retina, resulting in blurred or distorted vision. It is usually caused by an irregular curvature of the cornea or lens. The term can also apply to instruments, like cameras or lenses, which have a similar fault.

Webster Dictionary

  1. Astigmaticadjective

    affected with, or pertaining to, astigmatism; as, astigmatic eyes; also, remedying astigmatism; as, astigmatic lenses

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  1. Chaldean Numerology

    The numerical value of astigmatic in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of astigmatic in Pythagorean Numerology is: 3

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"astigmatic." Definitions.net. STANDS4 LLC, 2023. Web. 10 Dec. 2023. <https://www.definitions.net/definition/astigmatic>.

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