The laser in situ keratomileusis (LASIK) is the most widely used refractory surgical method world with excellent results, but this not without risks. Post-LASIK ectasia a serious complication and characterized by progressive increase curvature thinning of cornea, resulting irregular astigmatism decreasing visual acuity. Its incidence current literature approximately 0.033%. main treatment for i...

The three-dimensional (3D) finite element model of human eye was established, and the intraocular pressure (IOP) loaded to simulate refractive surgery. biomechanical properties cornea after SMILE LASIK surgery were studied from stress, strain induced wavefront aberration. Our results showed that had less impact on biomechanics, having stress changes than LASIK. However, increased with increase ...

PURPOSE To compare dry eye after small incision lenticule extraction (SMILE) and femtosecond laser-assisted LASIK (FS-LASIK) for correcting myopia. METHODS CENTRAL, Embase and PubMed were searched in November 2016. All randomized controlled trials (RCTs) and prospective cohorts that compared dry eye after SMILE with FS-LASIK were selected. RESULTS Five cohorts and one RCT were identified fo...

OBJECTIVE To evaluate the static and dynamic contrast sensitivity changes in myopic patients before and after laser in situ keratomileusis (LASIK). METHODS Seventy-three eyes in 37 patients with myopia (with or without astigmatism) who received LASIK were tested for static and dynamic contrast sensitivities using the METRO VISION MON ELEC I system at 0.7, 1.4, 2.7, 5.5, 11, and 22 cpd and cps...

PURPOSE To evaluate the efficacy and safety of conductive keratoplasty (CK) for the treatment of presbyopia and analyze the differences in the effects between post- and non-laser in situ keratomileusis (LASIK) eyes. Clinical preoperative factors that could affect the predictability of CK were also analyzed. METHODS The visual and refractive outcomes of CK for the treatment of presbyopia in 14...

purpose: to evaluate and compare tear secretion and tear film instability following laser in situ keratomileusis (lasik) and laser assisted subepithelial keratectomy (lasek). methods: in a randomized clinical trial, 30 eyes of 15 patients underwent lasik and 30 eyes of 15 patients underwent lasek to correct myopia. tear secretion and tear film instability were tested preoperatively, 2 and 6 wee...

PURPOSE To describe the incidence, management, and visual outcomes of buttonholed laser in situ keratomileusis (LASIK) flaps. SETTING Private practice, Riyadh, Saudi Arabia. METHODS This retrospective review identified eyes that developed buttonholed flaps during LASIK. Preoperative, intraoperative, and postoperative data were obtained to identify factors predictive of this complication. ...

Purpose. To quantify corneal epithelial thickness changes after myopic LASIK by OCT. Methods. Epithelial thickness before and after myopic LASIK were measured by a Fourier-domain OCT system. Average central (within 1 mm diameter) and paracentral epithelial thickness (5~6 mm diameter) before and after LASIK were compared. Correlation between central epithelial thickness change and laser spherica...

PURPOSE To report the rate of postoperative ectasia after laser-assisted in situ keratomileusis (LASIK) with femtosecond laser-assisted flap creation, in a population of patients with no identified preoperative risk factors. METHODS A retrospective case review of 1,992 eyes (1,364 patients) treated between March 2007 and January 2009 was conducted, with a follow up of over 4 years. After iden...

OBJECTIVE To assess efficacy, safety, predictability, stability, and changes in corneal higher-order aberrations (CHOAs) and contrast sensitivity (CS) after a femtosecond laser for LASIK and standard LASIK for myopia. DESIGN Prospective, randomized, comparative clinical study. PARTICIPANTS Two hundred eyes of 100 consecutive patients who underwent LASIK treatment using the VISX S2 laser sys...