astigmatism

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English[edit]

Pronunciation[edit]

Etymology[edit]

From a- (not) +‎ stem of Ancient Greek στίγμα (stígma, mark, point) +‎ -ism

Noun[edit]

astigmatism (plural astigmatisms)

  1. (optics) 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. (pathology) 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.

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Translations[edit]

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See also[edit]