Dictionary

keratectasia en · NOUN

Etymology

From kerat- + ectasia.

Meanings

1. (countable, uncountable) An abnormal bulging of the cornea due to thinning and scarring.
   • A clinical diagnosis of keratectasia can be suspected when a patient develops unstable vision associated with irregular astigmatism. It usually occurs 6 to 18 months after LASIK surgery, but it may occur at any time. 2006, Samir A. Melki, Dimitri T. Azar, 101 Pearls in Refractive, Cataract, and Corneal Surgery, →ISBN, page 66:
   • Increased negative keratometric diopters and oblate asphericity of the PCC are common after LASIK leading to mild keratectasia. 2006, Agarwals, Dr Agarwals' Textbook on Corneal Topography, →ISBN, page 130:
   • The minimum thickness of residual stroma to prevent ectasia should be 250 mm. However, some unknown factors can still be responsible for iatrogenic keratectasias. 2015, H. V. Nema, Nitin Nema, Recent Advances in Ophthalmology-12 - Volume 12, →ISBN, page 88:
   • We present a case of unilateral iatrogenic keratectasia developing 10 months after bilateral laser in situ keratomileusis (LASIK) involving enhancement surgery using a broad-beam excimer laser (Summit Apex) to treat 6.6 diopters (D) of myopia. 1999 April, Harry S Geggel, Audrey R Talley, “Delayed onset keratectasia following laser in situ keratomileusis”, in Journal of Cataract & Refractive Surgery, volume 25, number 4:

Forms

Relateds

keratectatic