Active clinical trials for "Retinal Diseases"

This is a Prospective Observational study. The aim of the study is to understand the underlying photoreceptor, retinal pigment epithelium or retinal vascular aberrations in inherited and acquired retinal disorders. The study would use adaptive optics (AO) technology to assist in-vivo visualization of these retinal structures and ascertain changes from normal. Further, by using the AO imaging in patients before and after treatments, this study aims to better understand the effect of various interventions and develop AO as an outcome measure in various retinal disorders.

Diabetic retinopathy is a significant source of visual morbidity in the adult population. Complications of diabetic retinopathy include ischemic maculopathy, macular edema, and sequelae of fibrovascular proliferation, such as vitreous hemorrhage (VH), tractional retinal detachment (TRD), and neovascular glaucoma.Pars plana vitrectomy (PPV) is traditionally performed for nonclearing VH, significant fibrovascular proliferation, refractive macular edema, and/or TRD, particularly if macula-involving. However, the pathogenesis is complex and multifactorial: Pro-infammatory cytokines and chemokines signifcantly contribute to the disease development and promote ischemic changes in the retina. Therefore, there is a potential role for intravitreal steroids in disease modifcation.

This study explores the use of melatonin in patients with diabetic retinopathy

This study aims to investigate the efficacy and safety of bromfenac sodium hydrate eye drops in patients with familial exudative vitreoretinopathy receiving diode laser photocoagulation.

This study proposes to carefully examine the hypothesis that human inducible pluripotent stem cells (iPSCs) can be effectively employed as a future therapeutic option for individuals with diabetic retinopathy and macular ischemia. iPSCs will be generated from the peripheral blood cells of subjects with diabetes and age matched controls. The human iPSC cells will be used to generate mesoderm cells for injection into the vitreous cavity of diabetic rodents and primate eyes. The ability of mesoderm cells to generate endothelial cells and pericytes in areas of degenerated capillaries will be examined. The human iPSCs will also be used to generate hematopoietic CD34+CD45+ cells. The combination of CD34+CD45+ cells derived from iPSCs and iPSC derived mesoderm will be examined in combination for their potentially beneficial effect to enhance the vessel formation.

The greatest harm of diabetes is various acute and chronic complications, especially diabetic retinopathy(DR), leading to extremely high rates of disability and blindness. Early screening, early diagnosis, and early treatment are the keys to maintaining vision in patients with DR. However, compared with the high prevalence of diabetes in China, the DR screening ability is relatively inadequate. To change this situation, deep learning(DL), a form of artificial intelligence (AI), might be a potential effective method to solve this dilemma.

With the increase in population and the rising prevalence of various diseases, the workload of disease diagnosis has sharply increased. The accessibility of healthcare services and long waiting times have become common issues in the public health medical system, with many primary patients having to wait for extended periods to receive medical services. There is an urgent need for rapid, accurate, and low-cost diagnostic services.

Retinal surgeries are now performed in some hospitals with sub-Tenon anesthesia to replace conventional peribulbar anesthesia. The advantages of performing the surgery with Tenonian anesthesia can be: the cost reduced due to the non-intervention of an anesthesiologist, no pre-operative anesthetic consultation, no waiting period for the effectiveness of the peribulbar anesthesia (15-20min to have the effect of anesthesia of the eye). In addition, there are more numerous and dangerous complications of peribulbar anesthesia than sub-Tenonian anesthesia, however it allows the eye to remain stationary and to perform precise surgery safely, as long as the patient does not move his head. Performing a sub-Tenonian anesthesia also makes it possible to carry out surgeries more quickly, this method having an immediate effect and being performed by the surgeon, without the intervention of an anesthesiologist. The edema effect under the post / conjunctiva swells the area around the eye and allows partial oculomotor limitation. Finally, for the patient, recovery is faster: no sedation or venous route. To date, however, no study has proven that the surgeon can safely operate on the patient without increased complications compared to peribulbar anesthesia. This study aims to show that simple sub-Tenonian anesthesia in a short outpatient circuit does not induce more pain or discomfort for the patient than a longer outpatient circuit with bed and anesthesiologist. No studies have been performed on purely local anesthesia without a venous route. For this, patients operated on at the Foch hospital without an anesthesiologist under subtenon's anesthesia will be compared to patients operated on under peribulbar anesthesia with an anesthesiologist at the Pierre Cherest clinic.

The choroidal thickness was found to be thinner in diabetic eyes without retinopathy compared to healthy eyes, thus choroidal thickness might be an important parameter for the development of diabetic retinopathy in diabetic eyes without retinopathy. Repeated low-level red-light (RLRL) therapy is an emerging innovative and non-invasive treatment for a variety of eye diseases. Notably, RLRL was found to be effective in thickening choroidal thickness in a 1-year randomized controlled trial, indicating its potential in modulating blood flow in the fundus. This study aims to answer whether RLRL therapy can thicken choroidal thickness in adults with diabetes mellitus or diabetic retinopathy.

An observational study to evaluate different biomarkers of subjects with geographic atrophy secondary to age-related macular degeneration