keratectasia
English
[edit]Etymology
[edit]Noun
[edit]keratectasia (countable and uncountable, plural keratectasias)
- (medicine) An abnormal bulging of the cornea due to thinning and scarring.
- 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:
- 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.
- 2006, Samir A. Melki, Dimitri T. Azar, 101 Pearls in Refractive, Cataract, and Corneal Surgery, →ISBN, page 66:
- 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, Agarwals, Dr Agarwals' Textbook on Corneal Topography, →ISBN, page 130:
- Increased negative keratometric diopters and oblate asphericity of the PCC are common after LASIK leading to mild keratectasia.
- 2015, H. V. Nema, Nitin Nema, Recent Advances in Ophthalmology-12 - Volume 12, →ISBN, page 88:
- The minimum thickness of residual stroma to prevent ectasia should be 250 mm. However, some unknown factors can still be responsible for iatrogenic keratectasias.