Astigmatism Definition
ə-stĭgmə-tĭzəm
noun
An irregularity in the curvature of a lens, including the lens of the eye, so that light rays from an object do not meet in a single focal point, resulting in an indistinct or distorted image.
Webster's New World
Distorted view or judgment, as because of bias.
Webster's New World
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.
American Heritage Medicine
(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.
Wiktionary
Synonyms:
Antonyms:
Other Word Forms of Astigmatism
Noun
Singular:
astigmatism
Plural:
astigmatismsOrigin of Astigmatism
-
a– Greek stigma stigmat- point (from stizein stig- to tattoo steig- in Indo-European roots)
From American Heritage Dictionary of the English Language, 5th Edition
From a- (“not”) + stem of Ancient Greek στίγμα (stigma, “mark, point”) + -ism
From Wiktionary
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