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Transepithelial photorefractive keratectomy to treat mild myopia

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Abstract

Purpose

To assess the safety and effectiveness of transepithelial photorefractive keratectomy (T-PRK) in patients with mild myopia using the Schwind Amaris 750 s Excimer laser system which take corneal epithelium variability in consideration during ablation.

Methods

A prospective case series study of patients with mild myopia with or without astigmatism (spherical equivalent ≤ -3 diopters), who underwent T-PRK as a single-step treatment, was carried out at King Abdulaziz University Hospital, Riyadh between May 2017 and January 2018. The main outcomes included postoperative uncorrected distance visual acuity (UDVA), residual refraction (manifest refraction) and complications.

Results

A total of 42 patients (84 eyes) underwent bilateral T-PRK with a preoperative spherical equivalent ranging from − 0.75 to − 3.00 D. Median spherical equivalent before Trans-PRK was − 1.75 (− 1.25to − 1.75). The spherical equivalent six months after Trans-PRK was 0.0 (− 0.25 to 0.5). All patients had a postoperative UDVA of 20/20 or better in the last follow-up. Transient postoperative corneal haze was observed in five eyes (6%).

Conclusion

T-PRK appears to be safe and effective in patients who have mild myopia, with or without astigmatism. The normal variation in corneal epithelial thickness seems not to affect the outcomes.

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Authors and Affiliations

  1. Department of Ophthalmology, College of Medicine, King Saud University, Airport Road, P.O. Box 245, Riyadh, 11411, Saudi Arabia

    Mohammed Alasmari & Abdullah M. Alfawaz

Authors
  1. Mohammed Alasmari
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  2. Abdullah M. Alfawaz
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by MA. The first draft of the manuscript was written by AA. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Abdullah M. Alfawaz.

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Conflicts of interest

The authors declare that they have no conflict of interest.

Ethical approval

The study was performed in adherence with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards, and it was approved by the Institutional Review Board at King Khaled University Hospital, Riyadh, KSA.

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Alasmari, M., M. Alfawaz, A. Transepithelial photorefractive keratectomy to treat mild myopia. Int Ophthalmol 41, 2575–2583 (2021). https://doi.org/10.1007/s10792-021-01816-y

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  • DOI: https://doi.org/10.1007/s10792-021-01816-y

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