View clinical trials related to Age-Related Macular Degeneration.
Filter by:Studying the morphology and function of the normal and diseased retina in vivo is needed for advancing the detection, diagnosis, and treatment of retinal disease. This protocol uses an adaptive optics scanning laser ophthalmoscope (AOSLO) to image the normal and diseased retina with individual cellular resolution non-invasively. The primary objective of this study is to obtain and analyze high-resolution images of the retina, in particular by imaging the cone photoreceptor mosaic, the retinal vasculature and other retinal layers. The study design will involve case-control studies, where cases are followed over time. Subjects age 7 and older may be invited to participate. The main research procedure involves retinal imaging with the AOSLO. The primary endpoint is the observation of differences in retinal images between subjects with and without retinal diseases. These changes will be quantified by examining the cell density, size, spacing and regularity of the cone photoreceptor mosaic, as well as examining the differences between other retinal layers.
Phase 1 trial of retinal pigment epithelium replacement in subjects with wet age-related macular degeneration in whom there is rapidly progressing vision loss
Genetic factors of an individual patient may have an impact on Ranibizumab (Lucentis) treatment outcome in patients with Wet Age-Related Macular Degeneration (AMD).
Patients who will be scheduled for intravitreal injection of Ranibizumab or Bevacizumab will be recruited in this prospective self-controlled trial. Fundus photography will carried out at baseline immediately before injection and at 3, 7 days and 30 days after the first injection. Using image analysis software, measurements summarized as the central retinal artery equivalent (CRAE) and central retinal vein equivalent (CRVE). Null Hypothesis: There is no significant difference between arteriolar/venular diameter before and after injection of intravitreal ranibizumab/bevacizumab in the treated and untreated eye
The investigators think that there is a connection between the use of plaquenil and the prevention of Age related macular degeneration (AMD). The investigators believe that the use of plaquenil makes bruch's membrane thicker, thereby preventing Chroidal Neovascularization (CNV) growth.
The purpose of this study is to confirm the clinical and economic benefits of IRay treatment with respect to the number of anti-VEGF injections and frequency of visits during the first year after treatment for patients with wet Age-related Macular Degeneration (AMD).
Background: - To understand diseases of the retina and the eye, information is needed about people with and without such diseases. Researchers want to study these people and follow them over time. They also want to study body tissues and blood to understand the nature of eye disease. Studying genes, cells, and tissues may help them understand why some people get eye problems and others do not, or why some people respond to treatment while others do not. Researchers want to collect physical samples and personal data to develop a National Eye Institute database. Objectives: - To collect health information and blood and tissue samples from people with and without eye diseases, to be used in research studies. Eligibility: - Individuals of any age with different types of eye disease. - Healthy volunteers with no history of eye disease. Design: - Participants may be recruited from National Eye Institute studies or may be referred from other sources. - Participants will be screened with a physical exam and medical history. They will also have a full eye exam. Questions will be asked about family medical history, especially about eye disease. - Blood samples will be collected. Other samples, such as saliva, tears, hair, stool, and urine, may be collected as needed. Adult participants may also provide a skin sample. - Tissue or fluid from eye collected as part of eye care or treatment may also be added to the database. - No treatment will be provided as part of this study.
Canadians fear loss of vision more than any other disability. Vision loss has an enormous impact on quality-of-life and is extremely costly from a societal and economic perspective. In 2001, more than 600,000 Canadians were estimated to have severe vision loss, accounting for 17% of total disability in Canada. One in 9 individuals experience severe vision loss by 65 years of age; however, this increases to 1 in 4 individuals by 75 years. The financial cost of vision loss in Canada is $15.8 billion per year. There is a general perception that vision loss is "normal with aging" but 75% of vision loss is estimated to be preventable. The major causes of severe vision loss are age-related macular degeneration (ARMD), glaucoma, particularly primary open-angle glaucoma (POAG), and diabetic retinopathy (DR). Canada is headed for an epidemic of age-related eye disease and, unless something is done to prepare for this, severe vision loss will have significant consequences in terms of societal and economic costs. Through this proposed Research Program, and in conjunction with the investigators international academic and private sector partners, the investigators will build and develop unique quantitative imaging technologies to permit non-invasive assessment of visual changes, structural changes in the thickness of the retina at the back of the eye and also changes in the amount of blood flowing through the blood vessels that feed the retina with oxygen. This research will add to the investigators basic knowledge in predicting the development of sight-threatening change in patients with the three diseases, and facilitate earlier detection of the problem to help us discover earlier treatments for people with these conditions. The reliability of each imaging technology will be assessed by determining its ability to differentiate between diseased and healthy eyes. Cross-sectional analyses at yearly intervals, as well as change over time analyses, will be undertaken.
The rationale for evaluating LucentisTM (a recombinant humanized anti-human Vascular Endothelial Growth Factor (VEGF) monoclonal antibody (Fab) in patients with neovascular (wet) Age related Macular Degeneration (AMD) is based on the strong correlation between VEGF levels in aqueous and vitreous humor and active blood vessel formation. LucentisTM has been shown to maintain or improve vision in wet AMD. Since the treatments do not halt the loss of visual acuity in wet AMD, it is important to accurately measure anatomic response to treatments thereby enhancing the ability to understand patterns of response and predict the necessity for continued therapy.
Lutein is one of oxygenated carotenoids. Over the past few years, there has been increased interest in evaluating the effect of lutein for optimizing eye health. A large number of epidemiological studies support the notion that the high intake dietary of lutein is strongly associated with a decreased relative risk of AMD.Moreover, findings from initial observational studies have now been followed by placebo-controlled intervention trials showing that dietary modification and supplementation with lutein result in increasing the macular pigment optical density, and may help to improve visual function in patients suffering from AMD.Currently, nutritional status and background information of lutein and zeaxanthin in Chinese population is lack. Little is known about the preventive and therapy benefits of lutein on visual function in the AMD populations. In particular, the effect on visual function of relatively certain doses of lutein and zeaxanthin is unknown. Therefore, the objective of the present study was to examine the effect of consuming different doses of lutein on MPOD and visual function in AMD.