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astigmatism

noun [U]
 
 
/əˈstɪɡ.mə.tɪ.zəm/

Definition

a fault in the lens of the eye that reduces the quality of sight, especially a fault that stops the eye from focusingEyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers astigmatic
 
 
/ˌæs.tɪɡˈmæt.ɪk/ US  /-ˈmæt̬-/ adjective
Eyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers
(Definition of astigmatism noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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