IRCT20200317046804N1 IRCT 2020-05-05 Noor Eye Hospital Conventional and transepithelial PRK Comparison of conventional and transepithelial photorefractive keratectomy in myopic and myopic astigmatism patients 2020-05-04 anticipated 60 Complete https://irct.ir/trial/46588 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The randomization will be done using permuted-block randomization method and based on a block size of 4. The random sequence of blocks will be obtained from the random number table. In the first stage, patients will be assigned to one of the two intervention groups A and B, and in the second stage, it will be randomized to determine which eye will be operated on by transepithelial method. Allocation concealment will be performed by sequentially numbered, sealed, opaque envelopesa, Blinding description: Patients are unaware of which group they are in. People who do the tests (optometrist and clinical ophthalmologist) will also be unaware of which intervention group they are evaluating. N/A Corneal epithelium debridement in Photorefractive keratectomy. Intervention 1: Intervention group 1: Both patient's eyes underwent photorefractive keratectomy, but the method of corneal epithelial removal is different. In one eye, the epithelium is removed mechanically by the surgeon, and in the other eye, it is done by excimer laser device without the intervention of the surgeon's hand. Intervention 2: Intervention group 2: Both patient's eyes underwent photorefractive keratectomy, but the method of corneal epithelial removal is different. In one eye, the epithelium is removed using alcohol and by the surgeon, and in the other eye, it is done by excimer laser device without the intervention of the surgeon's hand. No - There is not a plan to make this available Justification or reason for not sharing IPD is There are no more information.