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astigmatism
(redirected from corneal astigmatism)

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astigmatism

Aberration occurring in the lens of the eye. It results when the curvature of the lens differs in two perpendicular planes, so that rays in one plane may be in focus while rays in the other are not. With astigmatic eyesight, the vertical and horizontal cannot be in focus at the same time; correction is by the use of a lens that reduces the overall focal length of one plane so that both planes are seen in sharp focus.



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? Mentioned in ? References in periodicals archive
 
Astigmatism-correcting IOLs, such as Alcon's AcrySof([R]) Toric IOL, reduce or eliminate pre-existing corneal astigmatism at the time of cataract surgery.
CMS Ruling Provides Medicare Beneficiaries Access to ... by Business Wire
Food and Drug Administration (FDA) approved the AcrySof(R) Toric intraocular lens (IOL) for use in cataract patients with pre-existing corneal astigmatism.
FDA Approves Alcon's AcrySof(R) Toric Intraocular Lens by Business Wire
He developed innovative surgical techniques for corneal and cataract surgery and performed the first surgeries in this country for the correction of corneal astigmatism and the first lamellar refractive surgeries.
Kevin C. Greenidge, M.D., M.P.H., SUNY Downstate's Chairman of ... by Business Wire
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