Evaluation of Efficacy and Safety of Topical 1% Medroxyprogesterone in the Corneal Epithelium Healing After PRK

Patients who have referred for refractive surgery to correct myopia and myopia-stigmatism first undergo complete examinations that are required before the procedure, which includes the following examinations:

1. manifest and cycloplegic refraction
2. UCVA and BCVA
3. Pentacam(topographic imaging)
4. Examining the anterior and posterior segments of the eye with a slit lamp device Placed. Then, on the day of the surgery, in the refractive surgery operating room, the eyes are prepared . Anesthetizing drops of enstocaine are poured into the eyes. After removing the corneal epithelium, laser ablation is performed using the Technolas Teneo 317 device, and then mitomycin C is placed on the cornea based on the amount of ablation and then washed. At the end of the procedure, a contact lens bandage is placed on the eyes, and then a drop of the antibiotic ciprofloxacin is poured into the eyes. At this stage, a 1% medroxyprogesterone drop will be randomly poured into one of the eyes. After discharge, ciprofloxacin and betamethasone drops are routinely prescribed for the patient every 4 hours, and the patient returns for examination on the day after the operation and on the third and fifth days after the operation. (7) In each visit, the size of the corneal epithelial defect is measured by an ophthalmologist with a slit lamp examination as the largest length of the defect and the largest perpendicular length in millimeters. (2) Regarding the patient's pain and discomfort, a questionnaire is used to score the pain intensity by the patient (0: no pain, 1: mild pain, 2: moderate pain, 3: severe pain, 4: unbearable pain). (8) and the checklist includes information: pain intensity, optical size Defect, gender, age, ablation rate, and refractive error will be checked and recorded.

The patient and the examiner do not know about the eye in which medroxyprogesterone drops were used at the end of the procedure.

Medroxyprogesterone drops are made by a pharmacologist under sterile conditions and delivered the day before the operation.

• prepared drop of medroxy progestrone acetat 1% (Drug), also known as depo provera: In 37 patients who are candidates for photorefractive keratectomy, at the end of the procedure, in one eye randomly, in addition to the antibiotic drop that is routinely placed at the end of the procedure, a drop of prepared medroxyprogesterone is also placed. Then, a bandage contact lens is placed on the eyes, and the patient receives the routine post-procedure drops that include betamethasone and ciprofloxacin drops for both eyes.

Primary outcomes

• Determining the efficacy and safety of 1% topical medroxyprogesterone in repairing the corneal epithelium after photorefractive keratectomy (PRK) [3 months]: Determining the efficacy and safety of 1% topical medroxyprogesterone in repairing the corneal epithelium after photorefractive keratectomy (PRK)

Sex: All, ages: 18 Years to any, accepts healthy volunteers

Inclusion Criteria:

* 1- Age above 18 years 2- Myopia and myopic astigmatism 3- The stability of the patient's refraction over the past year 4-- Not using contact lenses at least 3 weeks before the operation 5- Absence of history of KCN and any type of corneal ectasia in the patient himself or his first degree family 6- Full satisfaction and knowledge of patients to enter the plan 7- No history of previous eye surgery and eye trauma 8- Absence of active eye diseases, corneal dystrophy, retinal diseases, glaucoma, dry eyes of any degree.

  9- Absence of systemic diseases that can potentially interfere with wound healing, including diabetes, vascular collagen diseases, and pregnancy.

  10- Not taking inhaled or systemic steroids actively or within 3 months before the procedure

Exclusion Criteria:

1. The patient's lack of consent to continue the study
2. Failure to visit the patient for follow-up

• Alireza Peyman, MD, Study chair, Isfahan ophthalmology research centre