Analysis of ectasia after laser in situ keratomileusis: Risk factors

Abstract

Individual preoperative and operative factors did not in and of themselves increase the risk for ectasia. Unmeasured and unknown factors that affect the individual cornea's biomechanical stability, in combination with some suspected risk factors as well as the current inability to identify corneas at risk for developing ectatic disorders, probably account for most eyes that develop ectasia today.

Pain, wound healing and refractive comparison of mechanical and transepithelial debridement in photorefractive keratectomy for myopia: Results of 1 year follow-up

“…The advents of excimer LASER refractive surgery heralded a new era in ophthalmic practice [1,2]. Evolution of both LASERs and surgical techniques has resulted in millions of patients having undergone LASER-based procedures [3].…”

Aspheric Refractive Correction of Irregular Astimatism

“…The shrinking effect is larger for major corrections, i.e. larger optical zones should be used for major corrections, but larger optical zones result in deeper and longer ablations increasing the potential risks of keratectasia 30 , 31 . A similar approach was used by Tabernero et al 32 , applied in a different way.…”

PRK em olhos com topografia atípica e pentacam normal

“…Preoperative analysis includes ultrasound pachymetry and keratoscopy with Placido disc, which are still considered the gold standard tests for refractive surgery. Changes in corneal topography are the main risk factor for iatrogenic keratoconus (3,4) , identifying candidates with a predisposition to the condition.…”