Clinical Research Directory

Central Serous Chorioretinopathy and Micropulse Laser Treatment

To evaluate choroidal and choriocapillaris changes in patients with central serous chorioretinopathy, undergone sub threshold micropulse laser treatment, following any improvement with conservative therapy with Acetazolamide and/or Eplerenone

Evaluating Efficacy and Safety of Oral Melatonin in Acute Central Serous Chorioretinopathy

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 Study of the Association Between the Gut Microbiota and Central Serous Chorioretinopathy

To investigate the potential association between gut microbiota and central serous chorioretinopathy (CSC), we have observed in our clinical practice that CSC patients often experience chronic gastrointestinal issues. This observation has led us to hypothesize that CSC may be associated with gut dysbiosis. The Bifidobacterium genus is widely recognized as a beneficial gut bacterium, and numerous well-established Bifidobacterium supplements are available on the market. To explore this possible connection, we will collect fecal samples from both CSC patients and healthy individuals. Using whole-metagenome shotgun sequencing, we will compare the gut microbiota compositions of the two groups to determine if significant differences exist. Additionally, we will randomly assign patients to two groups: one group will receive Bifidobacterium supplements for at least one month, while the other group will receive a placebo. We will then assess whether the group receiving the supplements experiences faster recovery and lower relapse rates compared to the placebo group.

Subthreshold Nanosecond Laser for Non-resolving Central Serous Chorioretinopathy

This is a prospective, multicentre, sham-controlled, participant- and assessor-masked superiority trial with two parallel treatment arms which aims to investigate the safety and efficacy of subthreshold nanosecond laser (SNL) in a series of adults with sub-retinal fluid secondary to non-resolving central serous chorioretinopathy (CSCR) by visual and anatomical outcomes. The study population will be individuals with adults (aged 18-70 years inclusive) with non-resolving CSCR (defined as CSCR present for a duration of more than 3 months presenting with either focal or diffuse leakage) who meet all eligibility criteria. 60 subjects total will be enrolled into the study - 40 randomized to receive SNL treatment and 20 to receive sham treatment as per a 2:1 randomization schedule and stratified by type of CSCR (focal vs diffuse). The study has a 24-week study period with five scheduled visits: screening, randomisation (first treatment), 6-week follow up (with second treatment where eligible), 12-week follow-up , 18-week follow-up, and 24-week follow-up. The primary outcome is the proportion of laser-treated study eyes that show resolution of sub-retinal fluid (SRF) as observed on optical coherence tomography (OCT) compared to sham-treated study eyes at 24 weeks. The safety endpoint will be proportion of laser-treated eyes that lose ≥10 letters of of vision (measured on a standard vision chart) compared to sham-treated study eyes and fellow eyes over 24 weeks.

Combination of Micropulse Laser With or Without Photodynamic Therapy for Chronic Central Serous Chorioretinopathy

In this study, patients with chronic central serous chorioretinopathy who were treated by micropulse laser alone or micropulse laser combined with photodynamic therapy without drugs are retrospectively included. The visual acuity changes, subretinal fluid absorption and choroidal characteristics of the two groups are compared 1 to 6 months after treatment. We will also analyze baseline characteristics that influence post-treatment outcomes to identify potential predictors of poor treatment outcomes.

Choroidal Blood Flow in Acute and Chronic Central Serous Chorioretinopathy

Patients with central serous chorioretinopathy (CSC) will be monitored with laser speckle flow graphy (LSFG), swept source optical coherence tomography (SS-OCT) and SS-OCT angiography (SS-OCTA). The aim is to unveil the flow and pulse wave characteristics of the choroidal circulation in acute CSC and chronic CSC.

OCT in Rare Chorioretinal Diseases

This study will evaluate the total blood flow in the retina and choroid (structures in the back of the eye) by Doppler optical coherence tomography (OCT) and OCT angiography. Angiography is mapping of the blood vessels. The purpose of measuring blood flow in the retina and choroid is to 1.) determine if rare diseases in these structures causes a change in blood flow compared to healthy eyes and 2.) find out if areas of changed blood flow line up with areas of damage that appear on conventional testing.