Active clinical trials for "Retinal Diseases"

To evaluate efficacy of different intravitreal Conbercept injection therapy in the treatment of severe proliferative diabetic retinopathy.

A Phase 2, Randomized, Double-masked, Placebo-controlled Multicenter Clinical Trial Designed to Evaluate the Safety and Efficacy of Luminate in Inducing PVD in Subjects with Non-Proliferative Diabetic Retinopathy.

The purpose of this trial is to evaluate safety and to compare the efficacy of intravitreous injection of ranibizumab alone (0.5 mg), versus combination of intravitreous injection of ranibizumab (0.5 mg) plus panretinal photocoagulation, versus panretinal photocoagulation alone in the regression of retinal neovascularization in eyes with high-risk proliferative diabetic retinopathy.

To evaluate the efficacy of intravitreal bevacizumab injections for treatment of proliferative diabetic retinopathy (PDR) with new dense vitreous hemorrhage (VH) after previous full panretinal photocoagulation (PRP).

Vitamin A is essential for optimal growth, and development. In the newborn, especially if preterm, it is necessary for the cellular differentiation, for the health of the anterior eye, it is a constituent of visual pigment, and it is essential for surfactant synthesis. Immune response Vitamin A supplementation demonstrated to reduces infancy mortality, but very low (<1500g birth weight) and extremely low (<1000g birth weight) preterm infants are born with low body stores of vitamin A and are at high risk of vitamin A deficiency. Nevertheless, optimal vitamin A supplementation for these infants is not clearly defined, despite evidence of benefit of an early supplementation. Prematurity is associate to the risk for bronchopulmonary dysplasia (BPD) which is a disease marked by respiratory compromise associated with high mortality and severe long-term morbidity, as well as prematurity is associate to the risk for retinopathy, a pathology that may be related to less rhodopsin quantity which seem dependent on vitamin A concentration. Vitamin A can be given enterally, intramuscularly, or intravenously. Recently an oral administration as drops is available resulting particularly convenient avoiding the pain associated with repetitive intramuscular injections, or the discomfort of parenteral administration. Studies of vitamin A in the infant population suggest that plasma retinol concentrations >0.7 µM/L indicate vitamin A sufficiency, nevertheless preterm infants have lower concentration and concentration < 0.35 µM/L are very dangerous. Vitamin A deficiency at this level may constitute a problem for preterm newborn, resulting for example, in histological alterations in the respiratory epithelium leading to chronic lung disease, retinopathy of prematurity, patency of the ductus arteriosis, and immune competence deficiency. The aim of the present study is to verify efficacy and tolerability of a new oral administration of vitamin A as drops, 3000 IU/kg/die for 4 weeks, in infants < 1500g weight at birth, verifying the competence of the supplementation reaching ideal blood concentration (≥0.7 µM/L) and relating the blood achieved concentrations of vitamin A to the outcome in typical pathologies, as BPD and ROP. Not treated group of matched newborn infants is the controlarm.

Background: Central serous chorioretinopathy (CSC) is a disease in which fluid accumulates under the retina and can cause distorted vision. CSC often resolves on its own without treatment, but in chronic CSC the fluid persists and can lead to permanent visual loss. Chronic CSC may be partly caused by hormones called androgens. Finasteride is a drug that can modulate the effects of androgens; currently it is marketed as a treatment for male pattern baldness and benign prostate enlargement. The results of a previous brief study suggest that finasteride is safe and may help reduce the effects of chronic CSC. However, more long-term data are needed to evaluate whether finasteride is a safe and effective treatment for chronic CSC. Objectives: - To collect more data on the safety and effectiveness of finasteride as a treatment for chronic central serous chorioretinopathy. Eligibility: - Individuals who previously participated in NCT00837252 (NIH protocol 09-EI-0075), Pilot Study for the Evaluation of Finasteride in the Treatment of Chronic Central Serous Chorioretinopathy, and demonstrated clinical improvement on finasteride treatment. Design: The study requires 11 visits to the NEI outpatient clinic over 5 years, with visits occurring every 6 months. Participants will be screened with a medical history, physical examination, eye examination, and blood and urine tests. At each visit, participants will receive a supply of finasteride pills to take every day and will need to bring any leftover finasteride pills to the following visit. Participants will have eye examinations to test vision, eye pressure, eye movements, and retinal thickness. Additional eye examinations will evaluate the retina's sensitivity to light and study the blood vessels and flow of blood in the eyes. Blood and urine samples will be taken throughout the study. After the end of the study, participants may be able to speak to their doctor about continuing finasteride treatments with a prescription.

The purpose of this study is to evaluate the efficacy and safety of oral valproic acid to slow the progression of visual function and/or to improve the visual function in patients with retinitis pigmentosa (RP). Enrolled subjects in valproic acid group will be treated with oral valproic acid 500mg daily for 48 weeks. Visual function and safety will be assess before and after treatment (48 weeks) between valproic acid and control groups.

The purpose of this study is to determine whether the administration of propranolol is effective in the treatment of the retinopathy of the prematurity.

Macular edema remains a major cause of vision impairment in diabetic patients. Its pathogenesis is multifactorial and incompletely understood. Systemic factors seam to play a role in this pathogenesis, including high blood pressure. The objective of the study is to evaluate the effect of an intensified intervention on blood pressure and sleep apnea with that of conventional treatment in patients with type 2 diabetes and diabetic macular edema.

This is a Phase I clinical trial to test the safety and tolerability of intravitreal ranibizumab in the treatment of radiation retinopathy following plaque brachytherapy for patients with choroidal melanoma using the incidence and severity of events criteria. The secondary objective is to assess the efficacy of intravitreal ranibizumab on regression of radiation retinopathy by ophthalmic examination, fundus photography, fluorescein angiography, and optical coherence tomography, as well as visual acuity.