Abstract
Background:Laser corneal refractive surgery suits, technology and nomograms are improving with time. This may improve the refractive and visual outcomes of the patients.Objectives:To evaluate the safety, efficacy, stability, and predictability of wavefront-optimized photorefractive keratectomy and Laser-assisted in-situ keratomileusis in patients with myopia and myopic astigmatism over 1-year using WaveLight® EX500 Excimer Laser machine.Methods:In this prospective cohort study, refractive and visual outcomes in 596 eyes (365 patients), either having myopia or myopic astigmatism were assessed. Patients were divided into Two groups: 1) Patients who underwent PRK (53 eyes have myopia and 217 eyes have myopic astigmatism), 2) Patients who underwent LASIK (53 eyes have myopia and 273 eyes have myopic astigmatism).Results:At 12 months postoperatively 94.3% of the myopic patients reached their preoperative best corrected distance visual acuity at the final one year follow up visit post PRK and LASIK. In patients with myopic astigmatism who underwent LASIK and PRK, 95.2%, and 96.3% of the patients reached their preoperative best corrected distance visual acuity at the final one year follow up visit post LASIK and PRK, respectively. The efficacy and safety indices were 1.00 or more for all groups with no eye lost any line of best corrected distance visual acuity.Conclusion:Our study results confirm the excellent efficacy, safety, good predictability and stability of myopia / myopic astigmatism correction by either wavefront- optimized LASIK or PRK over 1-year follow-up without significant differences between them using the WaveLight® EX500 excimer laser system.
Highlights
Refractive errors, including myopia, hyperopia and astigmatism are common treatable problems
We present the outcomes of wavefront- optimized Photorefractive Keratectomy (PRK) and Lasik for myopia and myopic astigmatism over one year follow up
The mean sphere corrected in PRK patients was -2.20 +/- 0.99 but it was higher in Lasik patients -3.34 +/- 2.12
Summary
Refractive errors, including myopia, hyperopia and astigmatism are common treatable problems. Many ophthalmologists prefer Lasik over PRK mainly because of the speed of visual recovery and the less postoperative pain It avoids complications of PRK such as corneal haze when correcting high degrees of refractive errors, and the risk of delayed epithelial healing and/or infection. Other refractive surgeons prefer PRK over LASIK They claim that Lasik has its own complications, which are related to the flap creation, such as free or incomplete flap, epithelial ingrowth and diffuse lamellar keratitis [2, 3]. Both procedures proved to be safe and effective in treating refractive errors, and the choice of the procedure should be customized according to each case. This may improve the refractive and visual outcomes of the patients
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