Refractive results of photorefractive keratectomy comparing trans-PRK and PTK-PRK for correction of myopia and myopic astigmatism.

"Declarations Conflict of interestsThe authors have no relevant financial or non-financial interests to disclose. Ethical approvalThis study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of Heinrich Heine University in Düsseldorf (ID: 2022–1980). Consent to participateWritten informed consent was obtained from all individual participants included in the study. Conflict of interests The authors have no relevant financial or non-financial interests to disclose."

"Funding Open Access funding enabled and organized by Projekt DEAL."

"In this retrospective study, we compare data from 154 eyes of 86 patients, treated at the same private practices. This study was approved by the local research ethics committee (No. 2022–1980) and complies with the Declaration of Helsinki. Our study is registered in the German Clinical Trials Register, DRKS (DRKS−ID: DRKS00030977). All patients gave informed consent for the use of their routinely collected data for research purposes. In addition, all patients were older than 18 years and none had any ocular disease, previous ocular surgery or trauma, or general disorders affecting the eye. Patients with any systemic diseases that might affect the eye were excluded from surgery. We included only eyes with a spherical equivalent (SE) of −1 to −8 diopters (D)."