View clinical trials related to Eye Diseases.
Filter by:The purpose of this trial is to compare the effectiveness and safety of INS365 Ophthalmic Solution with Placebo when applied topically in subjects with dry eye disease.
The purpose of this study is to investigate how the addition of a new artificial tear product when applied to the tear layer affects contrast sensitivity and optical aberrations over time. We will also determine if there are any adverse effects associated with drop instillation.
This study will collect blood samples from patients with non-infectious eye inflammatory diseases a spectrum of eye disorders that can produce sight-threatening vision loss. The blood will be analyzed for substances that may provide a better understanding of the nature of these disorders, possibly leading to improved treatments. Treatment is not offered under this protocol. Patients 6 years of age and older with an eye inflammatory disease, including non-infectious uveitis, ocular cicatricial pemphigoid, non-infectious scleritis, episcleritis, Stevens Johnson syndrome, Moorens ulcer, peripheral ulcerative keratitis and keratoconjunctivitis sicca, may be eligible for this study. Patients may or may not currently be participating in a treatment trial. Participants will have blood drawn through a needle in an arm vein. More samples may be collected if patients enrolled in another study are scheduled for additional visits. No more than 4 teaspoonfuls of blood will be collected at any one time.
This project will compare the efficacy and safety of 2 methods of disease modification in the treatment of active moderate and severe thyroid orbitopathy. A prospective, randomized, double-blind, parallel, controlled multidisciplinary clinical trial involving Singapore National Eye Centre, National University Hospital, Changi General Hospital, Tan Tock Seng Hospital and University of British Columbia Orbital Services, Singapore Eye Research Institute, Singapore General Hospital Endocrinology and Radiology Departments and Tan Tock Seng Hospital Rheumatology Department is planned. The SingHealth-SGH High Field MR Research Laboratory will be involved in the MR imaging of the trial patients. Patients who satisfy the inclusion and exclusion criteria will be asked to participate in this trial. After informed consent (Appendix B) is obtained, each patient will be randomized into one of two treatment arms: 1) Intravenous high-dose pulsed methylprednisolone (1 gram infusion over 1 hour per day with a total of 3 doses over 3 days; 4 cycles at 6 weekly intervals) and oral placebo and 2) Intravenous high-dose pulsed methylprednisolone (same dose) plus oral methotrexate 7.5 mg per week for 2 weeks, increased to 10 mg per week for another 2 weeks then 12.5 mg per week for 5 months (total 6 months of methotrexate treatment). Depending on patient response, the dose can be further increased by 2.5mg per week every 4 weeks to a maximum of 20 mg per week. A strict management protocol will be observed for each recruited patient. Patients who develop adverse side effects or need for surgical intervention will receive appropriate treatment (i.e. treatment will deviate from the protocol but will continue to be monitored). Patients who refuse treatment will be observed clinically and with imaging as a natural control group until such time as intervention is accepted. The patients will have a baseline assessment followed by regular visits to assess treatment response and adverse effects. Observations will include the use of an inflammatory index, motility measurements including quantitative ductions, exophthalmometry readings, palpebral aperture readings and indices of optic nerve function. With regards to the imaging, the patients will be assessed with an initial quantitative CT scan and 3-Tesla MRI scan prior to treatment. After treatment is started, patients will also undergo repeat MRI scan at 24 weeks and 72 weeks to assess quantitative changes with treatment using the Muscle Diameter Index (MDI) and Pixel Value Ratio (PVR) for the inferior rectus, superior rectus, the medial rectus, lateral rectus and orbital fat (Appendix E). Serum and urine will be obtained at the same time intervals as the MRI scan to assess levels of thyroid hormones, thyroid antibodies and urinary glycosaminoglycans (GAGs). Free T4, free T3 and TSH will be recorded to monitor control of hyperthyroidism. Thyroid antibodies measured will include thyroid stimulating immunoglobulin (TSI), thyrotropin-binding inhibition antibody (TB II), thyroid peroxidase antibodies and thyroglobulin antibody. Other tests including the full blood count, urea and electrolytes will be run prior to each dose of steroid treatment and during follow-up to monitor for adverse effects. The results of the assessments will be analyzed for significant differences in treatment response between the 2 groups. The indices of interest will include the percentage of patients in each group who demonstrate a decrease in the inflammatory index of at least 2 points and the time taken for 50% of patients to show such a decrease. Other parameters that reflect the visual function and motility will be compared at different points in time after starting treatment to observe response and sustainability of response. From the serial MRI scans, quantitative analysis of orbital tissues will be done to identify changes with treatment. Antibody and GAG levels will be analyzed to detect any change with treatment. The types and frequency of adverse side effects in the 2 groups will also be assessed. 80 normal subjects will be recruited for MRI scan of the orbits and brain to obtain normative values for the MDI and PVR for the Asian population (Appendix E). This will include 20 subjects from each of 4 decades (21-30 years, 31-40 years, 41-50 years, 51-60 years). The normative data will also be used to create a virtual orbital atlas. This aspect of the study will be performed in collaboration with the Labs for Information Technology (A-Star).
Oral supplementation with the Age-Related Eye Disease Study (AREDS) formulation (antioxidant vitamins C and E, beta carotene, and zinc) has been shown to reduce the risk of progression to advanced age-related macular degeneration (AMD). Observational data suggest that increased dietary intake of lutein + zeaxanthin (carotenoids), omega-3 long-chain polyunsaturated fatty acids (docosahexaenoic acid [DHA] + eicosapentaenoic acid [EPA]), or both might further reduce this risk. AREDS2 was designed to test whether adding lutein + zeaxanthin, DHA + EPA, or lutein + zeaxanthin and DHA + EPA to the AREDS formulation might further reduce the risk of progression to advanced AMD. A secondary goal was to test the effects of eliminating beta carotene and reducing zinc dose in the AREDS formulation.
Since 1948, the Framingham Study has examined a group of men and women every two years for the primary purpose of studying the incidence and prevalence of cardiovascular disease and its risk factors. In 1971 the Framingham Study began a study of the offspring of the original group, including data collection on blood pressure, cigarette smoking, weight, and other factors that are of interest to studies of eye disease. Researchers gave eye exams to some of the original group and to the offspring group. Data from these eye exams have been used to examine risk factors for cataracts, diabetic retinopathy, myopia, and glaucoma. The purpose of this study is to use the previously collected data for continued research on eye-related disorders. No new eye examinations will be conducted. ...
The purpose of this study is to compare the effect of two antihypertensive drugs on retinal vessel diameter in young type 1 diabetics. The retinal vessel analyzer (RVA) was used to investigate how the drugs affected vessel diameter, when the subjects were exposed to an increase in blood pressure, induced by isometric muscle contraction and when they were stimulated by flickering light.
The purpose of this study is to evaluate the safety of Next Generation Ophthalmic Irrigating Solution (NGOIS) compared to BSS PLUS for use during surgery for removal of epimacular membrane and vitrectomy.
The purpose of this study is to evaluate the safety and efficacy of anecortave acetate depot when administered for the treatment of elevated IOP following treatment with steroids.
The use of vitamin E, vitamin C, beta carotene, and/or multivitamins may keep cancer, cardiovascular disease, eye diseases, or cognitive decline from occurring. This randomized clinical trial studied vitamin E, vitamin C, beta carotene, and/or multivitamins to see how well they work compared with placebos in preventing cancer, cardiovascular disease, eye disease, and cognitive decline in male doctors aged 50 years and older.