Comparison of Visual and Refractive Results After Transepithelial and Mechanical Photorefractive Keratectomy in Myopia

Overview

Journal Int Ophthalmol

Specialty Ophthalmology

Date 2017 Mar 29

PMID 28349503

Citations 8

Authors

Yusuf Yildirim

Onur Olcucu

Nese Alagoz

Alper Agca

Yalcin Karakucuk

Ahmet Demirok

Affiliations

Soon will be listed here.

Abstract

Purpose: To compare postoperative visual outcomes and higher-order aberrations (HOAs) following transepithelial photorefractive keratectomy (t-PRK) and mechanical photorefractive keratectomy (m-PRK).

Methods: The medical records of patients who underwent photorefractive keratectomy (PRK) were retrospectively evaluated. Forty-five patients were treated with m-PRK, and 45 were treated with t-PRK. Visual acuity, subjective manifest refraction, and corneal topography were analyzed before surgery and 12 months after surgery for both groups. Total HOAs, spherical, coma, and trefoil aberrations were derived from topography data over the 6-mm corneal zone.

Results: In the m-PRK group, the mean preoperative spherical equivalence (SE) changed from -3.15 ± 0.70 D preoperatively to -0.24 ± 0.70 D 1 year postoperatively. Likewise, SE decreased from -3.36 ± 0.63 to -0.25 ± 0.63 D in the t-PRK group 1 year after the surgery. The number of eyes within ± 0.50 D of the target refraction was 89% for m-PRK and 87% for t-PRK groups (p = 0.20). Eighty-four percentage of eyes in the t-PRK group and 80% of eyes in the m-PRK group showed an uncorrected distance visual acuity of 20/25 or better (p = 0.24). Total HOAs, spherical aberration, coma, and trefoil aberrations increased in both groups after surgery, but no statistically significant differences were detected postoperatively among the corneal aberrations.

Conclusions: t-PRK and m-PRK result in comparable refractive results for the correction of low and moderate myopia. Corneal aberrations induced by t-PRK and m-PRK were similar. Epithelial removal techniques do not affect visual, refractive results, or HOAs in PRK.

Citing Articles

Changes in Corneal Dynamics and Effective Optical Zone After Transepithelial Photorefractive Keratectomy for Myopia.

Yalcinkaya Cakir G, Cakir I, Kepez Yildiz B, Yildirim Y Beyoglu Eye J. 2024; 9(2):69-75.

PMID: 38854896 PMC: 11156476. DOI: 10.14744/bej.2024.93075.

Transepithelial photorefractive keratectomy: a prospective randomized comparative study between the two-step and the single-step techniques.

Abdel-Radi M, Shehata M, Mostafa M, Aly M Eye (Lond). 2022; 37(8):1545-1552.

PMID: 35864163 PMC: 10219954. DOI: 10.1038/s41433-022-02174-4.

Comparison of Long-Term Visual and Refractive Results of Transepithelial and Mechanical Photorefractive Keratectomy.

Yilmaz B, Agca A, Taskapili M Beyoglu Eye J. 2022; 7(2):121-125.

PMID: 35692276 PMC: 9169146. DOI: 10.14744/bej.2022.06978.

Factors affecting single-step transepithelial photorefractive keratectomy outcome in the treatment of mild, moderate, and high myopia: a cohort study.

Al-Mohaimeed M Int J Ophthalmol. 2022; 15(5):786-792.

PMID: 35601171 PMC: 9091891. DOI: 10.18240/ijo.2022.05.15.

Comparison of transepithelial and conventional photorefractive keratectomy in myopic and myopic astigmatism patients: a randomized contralateral trial.

Hashemi H, Alvani A, Aghamirsalim M, Miraftab M, Asgari S BMC Ophthalmol. 2022; 22(1):68.

PMID: 35148689 PMC: 8832736. DOI: 10.1186/s12886-022-02293-2.

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