Active clinical trials for "Diabetic Retinopathy"

Prevalence of Diabetic Retinopathy in São José do Rio Preto-SP-Brazil Abstract Objective: To determine the prevalence and characteristics of diabetic retinopathy (DR) among patients from São José do Rio Preto-SP-Brazil . Local: Departamento de Retina e Vítreo do Hospital do Olho de Rio Preto (HORP) Methods: Design: population-based cross-sectional study. The study sample, of 710 patients was derived from the HIPERDIA (Diabetes and High-blood pressure social health care program) of São José do Rio Preto . All patients , known to have diabetes , underwent an eye examination by biomicroscope and indirect ophthalmoscope to check for any signs of DR through dilated pupils. Participants were also interviewed and examined to determine their demographic characteristics, medical conditions and the realization of previous fundoscopic eye examination. Statistical studies were done with t -Student test , Fisher test or chi-square test.

Diabetic retinopathy (DR), a complication of diabetes, is a leading cause of blindness among working-aged adults globally. In its early stages, DR is symptomless, and can only be detected by an annual eye exam. Once the disease has progressed to the point where vision loss has occurred, the damage is irreversible. Consequently, early detection is quintessential in treating DR. Two barriers to early detection are poor patient compliance with the annual exam and lack of access to specialists in rural areas. This research is focused on developing and validating new, cost-effective predictive technologies that can improve early screening of DR. Our overall objective is to develop and implement an entire suite of tools to detect diabetes complications in order to augment care for underserved rural populations in the US and internationally.

The purpose of this study was to investigate the expression of selected genes both in epiretinal membranes (ERMs) and peripheral blood mononuclear cells (PBMCs) from patients with primary and secondary epiretinal membranes in proliferative diabetic retinopathy. Possible correlations between messenger ribonucleic acid (mRNA) levels of these genes were also identified.

The surgically-harvested eye tissue (ie. vitreous-retinal proliferative membrane, outflow pathway, retinas, and pterygium) is a complex tissue responsible for maintaining intraocular homeostasis or mediating ocular pathogenesis. Dysfunction of one or more resident cell types within the tissues results in different ocular disorder, leading to vision loss, or even blindness. In this study, we aim to use single-cell RNA sequencing to generate a comprehensive cell atlas of surgically-harvested eye tissues.

This study aims to compare the effect of Aurora handheld fundus camera with traditional desktop fundus camera in the fundus photography screening of diabetic patients, and to evaluate the effect of artificial intelligence algorithm in the diagnosis of diabetic retinopathy.

The purpose of this study is to evaluate the relationship between DME and obstructive sleep apnea (OSA). OSA impacts millions of North Americans, many of whom are undiagnosed. The investigators aim to evaluate if a relationship exists between the two diseases, whether or not the severity of OSA impacts the severity of DME, and whether treating OSA results in better treatment outcomes for DME. The study will involve the standard of care provided for both DME (involving anti-VEGF injections) and OSA (involving continuous positive airway pressure [CPAP] machine).Approximately 150 subjects are expected to be enrolled in this study. In summary: Question 1: Is there a correlation between DME and OSA? Question 2: Is there a relationship between the severity of DME (CRT and vision) and OSA (AHI index)? Question 3: Does treating OSA result in improving DME metrics, and does it neutralize the outcomes at 1 year compared to OSA negatives.

The primary objective of the protocol is to determine if intravitreal ranibizumab alone decreases retinal neovascularization from Proliferative Diabetic Retinopathy (PDR) with deferred panretinal photocoagulation (PRP) and/or vitrectomy at one year after treatment with ranibizumab has been initiated.

The study will investigate changes in the structure and function of blood vessels in the front and back of the eye following laser and anti-VEGF treatments for sight-threatening diabetic eye disease. Sixty four volunteers will be recruited, including age-matched control subjects and diabetic patients who require conventional or contemporary treatment for pre-existing diabetic eye disease. Volunteers will be assessed before and after treatment using state-of-the-art techniques to measure vision, the rate of blood flow and structure at the front and back of the eye and the effectiveness of blood flow delivery. Changes following treatment in these novel, non-invasive techniques will be quantified and described. We anticipate that conventional and new / developing treatments will lead to narrowing of the vessels and consequent reduction of blood flow at the back and front of the eye. There will be a strong relationship between structural changes of the eye and functional changes of blood vessels at the front and back of the eye. The results of this study will improve our understanding of the impact of the various treatments on the entire eye. The research will also ensure an improved understanding of the mechanisms of action of the various treatments and will provide insight of reasons for good or poor outcomes, based upon specific changes in structure and blood flow.

This study was conducted to investigate the levels of angiogenic factors and anti-angiogenic factors in the aqueous humor of patients with diabetic retinopathy.

All participants will underwent imaging using the OCTA system (Zeiss) with the anterior segment optical adaptor lens. The main outcomes are iris blood flow density and vascular density.