View clinical trials related to Diabetic Retinopathy.
Filter by:The investigators are doing this research for two reasons. The first is to see how the retina (back of your eye) changes when your blood sugar is treated with medication for the first time. This will help us better understand the progression of a condition known as Diabetic Retinopathy. The second reason is to provide diabetic blood samples, which will possibly help identify biomarkers for diabetic retinopathy. Biomarkers are things that indicate the presence of a specific condition, and indicate a higher likelihood of developing that condition.
In patients with confirmed diagnosis of diabetes, an eye examination and a comprehensive survey are conducted after recruitment in secondary diabetes care centers. All patients undergo a comprehensive eye examination including wide-angle fundus photograph and ocular cohaerence tomography. A questionnaire assesses the characteristics (history: diabetes duration, type of treatment), knowledge and personal attitudes of the persons affected. The relevant lab findings were collected from the electronic files. Main focus of the study is the concordance to the national screening recommendations (last eye exam, presence of retinopathy).
Diabetic retinopathy (DR) is a leading cause of new cases of blindness in people aged 20 to 65 years worldwide. Patients with DR may go on to develop a more severe form of the disease called Proliferative Diabetic Retinopathy (PDR), a condition in which abnormal new blood vessels may rupture and bleed inside the eye. When this advanced stage of retinopathy occurs, pan-retinal photocoagulation (laser treatment) is usually recommended. The purpose of the investigators study is to find if treating patients using a single session of lower intensity laser (Pascal® Pan Retinal Photo-Stimulation, P-RPhS) at an earlier stage in Diabetic Retinopathy (during the severe non-proliferative diabetic retinopathy stage) when the abnormal new vessels are not developed, will prevent diabetic patients to develop PDR. Patients included in the study will be randomized in three arms (randomization). In one arm patients will be treated with the normal parameters used in Pascal® laser, the second arm patients will be treated with a lower intensity than normal, using the Endpoint management system (a new software from the Pascal® laser which allow us to decrees the intensity of the burns (invisible burns) showing some landmarks with normal intensity so the area which has been treated can be viewed. And in the third arm the patients will be observed.
This study is designed to evaluate the prevalence of different stages of diabetic retinopathy and diabetic macular edema among patients suffering from type 1 diabetes (DM 1) for 5 to 25 years and have been treated with intensified insulin therapy aiming near-normal blood glucose levels for the whole duration of disease. Prevalence of different stages of diabetic retinopathy and diabetic macular edema is assessed using the modified Airlie House classification and the Early Treatment Diabetic Retinopathy Study (ETDRS) retinopathy severity scheme. Results of this study will provide the basis for designing further studies as well as staging and screening guidelines for diabetic retinopathy/diabetic macular edema.
The purpose of this trial is to determine the short-term effect of a self-care intervention on depression in patients with age-related macular degeneration or diabetic retinopathy.
There is evidence of the association between diabetic microangiopathy and elevated serum concentrations of advanced glycation end-products (AGEs). AGEs levels are associated with ingestion of specific foods (baked meats and milk powder); reducing their dietary intake lowers AGEs concentrations, with beneficial metabolic effects; however threre is still no evidence of whether this has an impact on microvascular complications of DM. We recently applied for funding to compare in a RCT the effects of Cholestyramine versus placebo, on visual electrophysiology. This drug is similar to Sevelamer in structure, both act as chelators of bile salts, and reduce absorption of dietary AGE, lowering serum levels. However it is essential to carry out preliminary tests to assess aspects that may imply adjustments to the proposed protocol, such as: 1) tolerance to the drug 2) short term effect of the drug versus placebo on serum levels of AGEs 3) effects of the drug versus placebo in levels of fat soluble vitamins (D and K specifically) 4) intra and interindividual variability of electrophysiological measurements of vision (ERGMF and optic nerve conduction velocity) 5) drug versus placebo in electrophysiological measurements of vision (neuroconduction ERGMF and optic nerve). Objective: The present project is planned as a pilot study, which will clarify points 1 to 5. Methodology: patients (6 DM2, 25 -50 y) will be assessed through anthropometry, clinical laboratory tests (creatinine, chemistry profile, lipid profile, microalbuminuria glycosylated hemoglobin, vitamin B12, 25OH vitamin D and prothrombin), dietary recalls specifically designed to analyze the regular consumption of AGEs, serum CML and neuro-ophthalmological study (fundus, ERGMF and optic nerve conduction). Subsequently each patient will be assigned to treatment with placebo for 3 months and then Cholestyramine 6 g / day for 12 weeks and at the end of each period will be reassessed using the same methodology. If patients cannot tolerate the drug, they will be assigned to a reduced AGE diet. Expected results: Cholestyramine will have side effect similar to placebo (mainly digestive). The active drug and not placebo will reduce serum levels of AGEs and electrophysiological parameters of vision at 12 weeks. It is expected that a low AGEs diet in patients who do not tolerate the drug will also reduce serum CML although to a lesser degree and will also induce electrophysiologic changes.
Diabetic retinopathy (DR) is a common complication of diabetes and is divided into non proliferative DR and proliferative DR. The damage is caused by either macular edema, macular ischemia that can be followed by vascular proliferation. Hyperbaric chamber treatment assists in increasing the amount of oxygen in the plasma and in the tissues and has been proven to be beneficial in treating different wounds in diabetic patients but its effect hasn't been tested in diabetic retinopathy yet. This study will recruit 40 diabetic patients who are scheduled for hyperbaric treatment due to different indications such as chronic wounds or radiation damages and who also have diabetic retinopathy. These patients will undergo opthalmic physical examination including fundus photography and OCT (Optical Coherence Tomography - optical IR retinal photography). Screening for these patients will be conducted at the Hyperbaric chamber at Assaf Harofe Medical Center for all diabetic patients prior to their first treatment.
The aim of the study is to find out prevalence and individual stages of Diabetic Retinopathy in patients with type 1 and type 2 DM verified based on complex ophthalmologic measurements in Slovak Republic. The outcome of the project will be epidemiology survey, prevalence of diabetic retinopathy (DR) and diabetic macular edema (DME) in relation to type and duration of diabetes mellitus and risk factors. Project will also identify genetic factors linked with the diseases.
Photocoagulation is the standard treatment in the focal EMCS, disrupts vascular leakage and allows the pigment epithelium remove the intraretinal fluid is effective in reducing the incidence of visual loss but can reduce contrast sensitivity and retinal sensitivity, the characteristics of the function can be reduced such as setting (location and stability) are relevant to the quality of the patient's vision parameters, reading comprehension, especially the ability, duration of diabetic macular edema, could have a significant impact on survival and / or the functional reserve of the macular cells subjected to mechanical and toxic stress-induced edema. It seems that in the treatment of patients with EMCS, photoreceptor damage occurs as a recent phenomenon, and can precede neurodegeneration retinal photoreceptor loss, whereby visual function can be decreased. An adjunctive treatment as Dorzolamide facilitating effect helping resorption of intraretinal fluid through EPR and reduce adverse events that is the loss of contrast sensitivity and retinal sensitivity, response time of photocoagulation treatment could be reduced to the patient, because the rate of resorption of intraretinal fluid is facilitated and thus the duration of the response, also could reduce damage to vision caused by the inadequacies of the photoreceptors during the evolution of macular edema avoiding moderate visual loss, there by increasing the quality of life in terms of improving the quality of vision in diabetic patients. In addition to obtaining a specific adjuvant treatment with photocoagulation is helpful for focal edema in diabetic and a new level using dorzolamide in retina Dorzolamide as adjunctive therapy after focal photocoagulation is more effective than placebo in improving visual function in patients with diabetic macular edema
Contrast sensitivity is a tool use to evaluate the visual function in all patients. It can be modified by different pathologies or by age. The purpose of this study is to identify the changes that could be in relationship with the course of diabetic retinopathy comparing with diabetic patient without retinopathy and in patients with diabetic macular edema so if it is a difference, research for therapeutic strategies to improve it in this patients.