Astigmatism

Definition of Astigmatism

A`stig´ma`tism
n.1.(Med. & Opt.) A defect of the eye or of a lens, in consequence of which the rays derived from one point are not brought to a single focal point, thus causing imperfect images or indistinctness of vision.

Related Words

ametropia, astigmia, keratectasia, keratoconus, ophthalmology
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