Clinical trials

The goal of this clinical trial is to learn if oral melatonin can enhance visual acuity and central macular thickness in central serous chorioretinopathy (CSCR) in adults. The main questions it aims to answer are: 1. How does melatonin affect central macula thickness in CSCR? 2. How does melatonin affect visual acuity in CSCR? Researchers will compare placebo (a look-like substance that contains no drug) to see if melatonin works to treat CSCR. Participants will: 1. Take melatonin or placebo twice a day for one month 2. Visit the clinic after finishing a course of treatment, and 1 and 3 months after that for visual acuity assessment and tests 3. Keep a diary of their symptoms

The primary goal of this study is to determine the effects of oral probiotics on the severity of ocular symptoms and the alterations of the gut microbiome of children (4-18 years old) with vernal keratoconjunctivitis. The current study will also assess the safety of oral probiotics among children with vernal keratoconjunctivitis. The main questions it aims to answer: 1- Does treatment with oral probiotics improve the severity of ocular symptoms in children with vernal keratoconjunctivitis? 2- Does treatment with oral probiotics alter the gut microbiome of children with vernal keratoconjunctivitis? Researchers will compare the ocular symptoms and gut microbiome between two groups receiving oral probiotics and placebo among children with vernal keratoconjunctivitis. Participants The participants will receive the oral probiotics and placebo ever day for one month. Record their regimen and keep a diary of their symptoms.

The goal of this clinical trial is to compare the administration of 2 drugs, cyclosporine 0.05% (Restasis) and Lifitgrast (Xiidra) before PRK, in reducing the ocular surface symptom of patients after PRK. The main questions it aims to answer are: 1- Does the use of cyclosporine 0.05% (Restasis) and Lifitgrast (Xiidra) before photorefractive keratectomy surgery (PRK) reduce ocular surface symptom such as eye pain, redness, and inflammation in conjunctivitis in patients? Researchers will compare cyclosporine 0.05% (Restasis) and Lifitgrast (Xiidra) to a placebo (Artelac artificial tears) to see if cyclosporine 0.05% and Lifitgrast works to reduce ocular surface symptom. Participants will: Take drug cyclosporine 0.05% and Lifitgrast or a Artelac 30 minutes before surgery Visit the clinic 6 hours, one day, three days and one week after photorefractive keratectomy (PRK) for checkups and tests