astigmatism

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“
That produces a condition called astigmatism, the effect of which is to make images appear blurry whether near or far.

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Definitions (6)

Toggle American Heritage definitions American Heritage Dictionary (1)

  1. noun A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at one point on the retina, resulting in blurred vision.

Toggle Century definitions Century Dictionary (2)

Toggle GNU Webster definitions GNU Webster's 1913 (1)

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Examples (36)

  • Corneal astigmatism is an irregularity of the cornea that can cause significantly blurred or distorted vision. —  Nachrichten Ticker - www.finanzen.net
  • Eyeballing those lines it's hard to see a clear relationship between piling on more debt and increased economic growth, rather the opposite, unless my astigmatism is playing up again. —  SeekingAlpha.com: Home Page
  • I have worn lenses for over 25 years and have been told by Ohio State University optial and other NY practitioners that my astigmatism is minimal and needs not to be addressed.
  • But what I'm about to experience goes far beyond my astigmatism, and I expect it will widen my myopic world view. —  Summit Daily News - Top Stories
  • That produces a condition called astigmatism, the effect of which is to make images appear blurry whether near or far. —  xml's Blinklist.com
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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. a-1 + Greek stigma, stigmat-, point (from stizein, stig-, to tattoo; see steig- in Indo-European roots).

Toggle Century etymologies Century Dictionary (1)

  1. Also astigmism, q. v.; from Greek ἀ- privative + στίγμα(τ-), a point, + -ism.
 

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/æsˈtɪgmətɪzm/
by American Heritage
by Parker Smith

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