Comparison of corneal biomechanical changes after refractive surgery by noncontact tonometry: small-incision lenticule extraction versus flap-based refractive surgery - a systematic review

摘要: Corneal refractive surgery disrupts corneal integrity and reduces biomechanical stability in consequence of the beneficial alteration. The minimal invasive cap-based procedure, small-incision lenticule extraction (SMILE), has been proposed to affect less than flap-based procedures, due fibre-sparing incision strong anterior lamellae. Flap-based procedures include laser-assisted situ keratomileusis (LASIK), femtosecond (FS-LASIK) (FLEx). purpose this systematic review was evaluate changes by noncontact air pulse tonometry after treatment myopia/myopic astigmatism with SMILE compared surgery. A total 220 publications were identified through a search PubMed Embase. Two levels screening nine studies (three randomised controlled trials (RCT) six nonrandomised clinical trials) eligible for review. All graded have an overall serious risk bias. Measurements Corvis ST not included any studies. RCTs found no statistical significant differences between or concerning hysteresis (CH) resistance factor (CRF), as measured Ocular Response Analyzer. However, greater reduction CRF CH group five two studies, respectively. findings illustrate that presumed advantages small could be demonstrated existing commercially available technology. lower evidence suggest affection viscoelastic properties when evaluating tonometry.