IRCT20231114060059N1 IRCT 2025-11-18 Mashhad University of Medical Sciences Investigating the effect of balance salt solution temperature zero degrees on pain control after photorefractive keratectomy effect of balanced salt solution temperatures in pain control and corneal epithelium healing after photorefractive keratectomy 2024-08-22 anticipated 116 Complete https://irct.ir/trial/74683 interventional Randomization: N/A, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Blinding description: the researcher is unaware of solutions temperature but the patient and outcome assessor are informed about the temperature. 3 Refractive error. In this study, in one patient's eye, room temperature balanced salt solution is poured during and after photorefractive keratectomy (control group) and in the other eye, zero degree balanced salt solution is poured during and after photorefractive keratectomy (intervention group).. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is ....