IRCT20161218031450N6 IRCT 2023-10-29 Tabriz University of Medical Sciences Comparison of the effect of 40% autologous serum drop with artificial tear drop in improving corneal epithelial injury after corneal collagen cross-linking surgery, Comparison of the effect of 40% autologous serum drop with artificial tear drop in improving corneal epithelial injury after corneal collagen cross-linking surgery, epithelium-off: a double-blind randomized controlled trial). 2023-09-09 anticipated 34 Complete https://irct.ir/trial/67252 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Using computer software (Random Allocation Software), the study subjects are placed into two intervention groups through blocks of four and six with an allocation ratio of 1:1 in two intervention groups (40% autologous serum) or control (artificial tear drops). The random allocation sequence will be generated by a person not involved in the research. The drops will be numbered according to the generated sequence from 1 to 34. The first drop will be given to the first patient who is eligible for the study and this will continue until the samples are completed. How to use eye drops will be taught, Blinding description: In this study, patients will be divided into two groups based on the randomization form. The patients and outcome assessor will not know how the drug was used. The data analyzer will also be unaware of how the drug is used in both groups. 2-3 Keratoconus. 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 Due to the unpreparedness of data and information, decisions in this regard will be possible after data extraction and sampling