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NCT07396831
The goal of this clinical study is to determine if antibiotic eye drops are needed after retinal surgery to prevent infection. Currently, patients are prescribed antibiotic eye drops to use for several weeks after they undergo retina surgery. The main question that we are trying to answer is: \- Are postoperative eye drops necessary to prevent eye infections after retina surgery? Patients will still receive steroid drops after their surgery to control inflammation. Additionally, patients will have regular follow up with their eye surgeon to monitor for the signs and symptoms of eye infection.
NCT06707168
Intraocular pressure is measured regularly at any and all visits with your eye doctor or optometrist. The purpose of this study is to compare measurements of eye pressure at the end of the surgery, comparing the ability of a gloved finger or sterile cotton-tipped applicator ("Q-tip") to accurately measure intraocular pressure against a standardized instrument designed for this purpose.
NCT05990829
Diabetic macular edema (DME) is the main cause of severe vision loss in diabetic retinopathy. Intravitreal injection of anti-vascular endothelial growth factor (VEGF) and Ozurdex are two safe and effective ways to treat DME. Pars plana vitrectomy is mainly suitable for the treatment of unabsorbed vitreous hemorrhage (VH) and tractional retinal detachment caused by proliferative diabetic retinopathy (PDR). Intraoperative optical coherence tomography (OCT), a diagnostic device, can be used to evaluate the potential condition of the retina. Many patients with PDR have unclear refractive stroma due to VH and other reasons, so preoperative OCT cannot give a clear diagnosis, so the use of intraoperative OCT can judge whether the patients are complicated with DME and give corresponding treatment. The purpose of this study is to explore the prognosis of patients with DME diagnosed by OCT during PPV and treated with PPV combined with aflibercept or PPV combined with Ozurdex, and to observe and compare the postoperative anatomical results, functional results, times of reinjections and the occurrence of adverse events between the two groups, in order to provide accurate treatment for patients, reduce the frequency of postoperative vitreous injection and lighten the burden of patients.
NCT05631054
Diabetic retinopathy (DR) is the main cause of blindness among working-age adults in the world. Proliferative diabetic retinopathy (PDR) is the severe stage of DR, which is characterized by neovascularization of the retina. Vitreous hemorrhage and traction retinal detachment caused by PDR often require vitrectomy. The purpose of vitrectomy is to remove vitreous hemorrhage, peel off the preretinal proliferative membrane and help restore the retina. With the deepening of people's understanding of diabetes and the development and application of various hypoglycemic drugs, the life expectancy of patients with diabetes continues to prolong. Therefore, the goal of vitrectomy in patients with DR is not only to prevent blindness, but also to maintain good vision for a long time. The purpose of this study is to analyze the risk factors related to the occurrence of long-term low vision postoperatively and establish a risk prediction model, which can help patients adjust their psychological expectations reasonably and promote communication between doctors and patients.
NCT04774146
silicone oil tamponade removal after previous injection of complicated retinal detachment can be achieved with active suction followed by triple air-fluid exchange or prolonged lavage of the vitreous chamber to remove emulsification. Purpose of the study is to compare the amount of silicone oil emulsification droplets within the lavage fluid in case of air exchange and simple lavage to compare which technique removed the highest percentage of emulsion. This is achieved by comparing consecutive samples of lavage fluid
NCT05013281
To analyze the characteristics, related risk factors, and prognosis of suprachoroidal hemorrhage (SCH) associated with pars plana vitrectomy (PPV).
NCT04278079
Investigate the effectiveness and safety of pars plans vitrectomy, with internal limiting membrane peeling for cases of myopic traction maculopathy
NCT00548197
Vitreoretinal surgery for epiretinal proliferation tractional retinal detachment associated with proliferative diabetic retinopathy (PDR) is often complicated by hemorrhage from fibrovascular tissue. To control the bleeding during tissue dissection multiple measures and techniques are used. Bevacizumab is an anti VEGF antibody which has been used to induce regression of ocular neovascularization. Its intraocular injection has been increasingly used for treatment of choroidal neovascularization (CNV) associated with age related macular degeneration (AMD) with fairly good success.Also it has been shown to be effective for treatment of PDR complicated with vitreous hemorrhage and iris neovascularization. We hypothesized that if anti-angiogenic agents, such as bevacizumab are injected into the vitreous cavity before vitrectomy in cases of PDR; there may be partial regression of neovascularization resulting in less intraoperative (and postoperative) hemorrhage. This can make the operation easier and shorter and lessen the need for intraocular cautery.. In this study diabetic patients who are candidated for vitrectomy with similar complexity scores will be randomized to preoperative injection or no injection of 2.5 mg Bevacizumab .In the injection group, 2.5 mg of bevacizumab (0.1 ml of commercially available Avastin vial, Genentech, inc. South San Francisco, CA) will be injected into the vitreous 3-5 days before operation. During each operation, the number of endodiathermy applications, backflush needle applications and the duration of surgery will be recorded by an independent observer. Also, type of tamponade, post operation vitreous hemorrhage and 3 months postoperative visual acuities wil be recorded. all these parameters will be compared in two groups.