PURPOSE To identify an optimal customized ablation strategy in the treatment of eyes with secondary irregular astigmatism. METHODS Corneal anterior surface elevation maps of 50 eyes with secondary irregular astigmatism after decentered laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK) and 50 virgin eyes were used for customized ablation simulations. Two ablation simula...

Aim: We aimed to compare the results of photorefractive keratectomy (PRK) and femtosecond-assisted laser in situ keratomileusis (FS-LASIK) procedures treatment myopia myopic astigmatism.
 Material Method: Seventy eyes 35 patients with and/or astigmatism who had undergone PRK procedure were compared retrospectively 70 FS-LASIK procedure. 
 Results: All completed 2-year follow-up period...

To the Editor: We read with interest the recent contribution by Dr. William Bond (Bond WI. PRK over incomplete LASIK flap [letter]. J Refract Surg 2000;16:483). We are convinced that some variant of the technique he described, which we think is probably more appropriately referred to as transepithelial PTK/PRK, will eventually become the procedure of choice for the treatment of some patients wh...

PURPOSE: To evaluate the safety and efficacy of laser in situ keratomileusis (LASIK) compared to photorefractive keratectomy (PRK) for the correction of low or moderate myopia (-0.50 to-6.00 D) at 6 months after surgery. refractive outcomes of LASIK and PRK were similar. Although flap related complications occurred only after LASIK, the overall risk of loss of best spectacle-corrected visual ac...

PURPOSE To evaluate the refractive and aberrometric outcome of wavefront-guided photorefractive keratectomy (PRK) compared to standard PRK in myopic patients. METHODS Fifty-six eyes of 56 patients were included in the study and were randomly divided into two groups. The study group consisted of 28 eyes with a mean spherical equivalent (SE) of -2.25+/-0.76 diopters (D) (range: -1.5 to -3.5 D) ...

INTRODUCTION Refractive surgery, specifically photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK), is becoming more accepted in the military environment. Determination of the impact on visual performance in the more demanding aviation environment was the impetus for this study. METHODS A prospective evaluation of 20 Black Hawk pilots pre-surgically and at 1 wk, 1 mo, an...

PURPOSE To determine the incidence of steroid induced ocular hypertension following myopic photorefractive keratectomy (PRK). METHODS Myopic PRK was performed on 506 eyes of 269 patients. Preoperatively, spherical equivalent refractive error ranged from -1.00 to -5.00 diopters (D) and cylinder was less than 4 D. Baseline intraocular pressure (IOP) before PRK and at different time intervals af...

Just when we thought photorefractive keratectomy (PRK) had achieved a level of safety and predictability in correcting refractive errors in our patients, new wounding healing information regarding apoptosis (programmed cell death) surfaces to show us that the way we remove the corneal epithelium matters a great deal in how the corneal stroma responds to our treatment.1 Excimer laser manufacture...

AIM To assess the safety and predictability of photorefractive keratotomy (PRK) and laser in situ keratomileusis (LASIK) based on preoperative corneal topography. METHODS A non-randomised comparative study was carried out on 84 eyes that presented with topographic abnormalities before undergoing PRK (n = 44) or LASIK (n = 40) procedures. 84 spherical equivalent paired normal eyes served as th...