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Related to keratectasia: keratoconus
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Noun1.keratectasia - abnormal bulging of the cornea of the eye
astigmatism, astigmia - (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
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With this treatment, 92.9% (13 of 14) patients were cured without any complications (keratectasia or perforation), and the mean duration for healing was (12.8 [+ or -] 5.4) days.
Keratoconus, Keratoglobus, Pellucid marginal degeneration, keratectasia following refractive surgery, Stromal opacities/scars sparing Descemet's membrane and Corneal dystrophies involving anterior/deep stroma.
This is particularly important in examinations prior to refractive surgery, as ectatic corneal disorders that have not been identified before refractive surgery may result in progressive keratectasia. Placido disk-based corneal topography is one of the methods commonly used to diagnose keratoconus.
Corneal Collagen Cross Linking (CXL) is a novel and promising technique known to halt the progression of keratoconus and secondary keratectasia by increasing the biomechanical strength of the cornea, deferring the necessity of corneal grafts.
McMonnies, "Abnormal rubbing and keratectasia," Eye and Contact Lens, vol.
It was first used to treat keratoconus in 1998 and its primary aim is to strengthen the weakened cornea in ectatic conditions or keratectasia. It has been shown that increasing collagen cross linking strengthens the human cornea by 328.9%.16 CXL is a proven, safe and effective procedure with few reported side effects.
However, overestimation may cause over-ablation, which may increase the risk of iatrogenic keratectasia.3 Therefore, studies evaluating CCT measurements using various instruments are essential and have significant clinical relevance.4,5
In addition to keratoconus, cross-linking has been proposed as a therapeutic option for iatrogenic keratectasia in photorefractive keratectomy (PRK) [39] and laser-assisted in situ keratomileusis (LASIK) [38,40], infectious corneal ulcers [41], pellucid marginal degeneration [42], and bullous keratopathy [43].
"Laser-assisted in-situ keratomileusis (LASIK) has gained widespread popularity as a safe and effective surgical method for the correction of myopia, but patients with high [severe] myopia or thin corneas face some restrictions in avoiding the risk of developing keratectasia [a weakening of the cornea]," the authors write as background information in the study paper, published in the Archives of Ophthalmology, one of the JAMA/Archives journals.
KERATECTASIA: In rare cases, excessive thinning of the eye wall can cause the shape and focusing power of the eye to become unstable after treatment.
They give readers a strong background preoperative examinations, surface ablation procedures, LASIK and lens-based surgeries and cover such common complications as DLK and corneal infections, topographic and wavefront aberrometry disasters, femtosecond laser complications, post-LASIK ectasia, de-centered ablations and iatrogenic keratectasia, along with less-encountered conditions.