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Astigmia

//əˈstɪɡmiʌ// noun

Definitions

Noun
  1. 1
    astigmatism dated, uncountable, usually

    "[…] and the measurement and correction of astigmia is one of the chief functions of the optometrist."

  2. 2
    (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point wordnet
  3. 3
    (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people wordnet

Etymology

From a- (negative prefix) + Ancient Greek στίγμα (stígma, “mark, point”) + -ia.

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