Active clinical trials for "Macular Degeneration"

Objective: The objective of this study was to determine whether the antioxidant supplements used in AREDS shifted the plasma pool of the AREDS subjects to a more reduced state. The AREDS subjects were randomly assigned to one of four treatment groups: antioxidants (500mg Vitamin C, 4000IU Vitamin E, 15mg beta carotene) zinc (80mg zinc oxide, 2mg cupric oxide) antioxidants plus zinc; placebo. None of the subjects received supplemental GSH or cyst (e) ine. Age-related macular degeneration (AMD) is the leading cause of severe visual impairment in elderly Americans, with an estimated 15 million people having some form of this disease. AMD primarily affects the central vision and many patients develop severe visual handicaps. Currently there are no clear established understandings of the etiology or pathogenesis of this disease.

The primary objective of this study is to estimate the sensitivity of the HMP test in identifying visual field functional defects in subjects with CNV secondary to AMD, and differentiate them from intermediate AMD subjects.

Study come to investigate the correlation between visual fields (VF) defects map generated by preferential hyperacuity perimeter (PHP) and features of the choroidal neovascular lesions (CNV) demonstrated by Optical Coherence Tomography(OCT). To investigate the Foresee PHP ability to asses treatment progression post treatment.

To validate a new methodology, named Retinal Leakage Analysis (RLA), for mapping the human Blood-Retinal Barrier (BRB) function, in the clinical practice.

The main objective of this observational study is to characterize and correlate functional and structural changes at the retinal level using the Retinal Leakage Analyzer (RLA) and the Optical Coherence Tomograph (OCT). To show if it is possible to use OCT as an indirect measurement of leakage, this study will check, in a primary analysis, for OCT changes between fluorescein leaking and non-leaking areas (identified by Retinal Leakage Analyzer). As a secondary objective, changes in RLA and OCT over time (between two consecutive visits) will be analyzed and characterized. The results of this study will be used exclusively for scientific purposes.

The purpose of the present study is to determine if the retinal thickness estimates of the Stratus OCT, the 3D OCT-1000, and the CirrusHD OCT are comparable in diabetic and in healthy individuals (OCT=Optical Coherence Tomography).

The purpose of this study is to determine the sensitivity of the optical coherence tomography (OCT) test in detecting neovascular AMD in eyes at high risk for CNV development. In order to test this hypothesis, we are conducting a multi-center clinical study at four participating clinical centers. A total of 227 participants will be enrolled. Participants will be followed-up for a period of two years, or until CNV develops in the study eye for which treatment is recommended, to determine the occurrence of CNV. The fundamental design principles of the study are simplicity and parsimony.

In this province, optometrists are often responsible for contacting the retinal specialists' office to arrange patients to be examined for suspected emergencies or more routine referrals related to the eye. This is often done by faxing a referral form to the specialists' office, where the retinal specialist will examine the information presented in the referral form and make a decision on when the patient should be seen. This current method has some important considerations, such as the difficulty of transmitting clear images of the back of the eye over fax. Having this information could help the retinal specialist in determining when the patient should be seen, especially in terms of booking additional tests or when treatment should be given. Teleophthalmology is a branch of telemedicine that delivers eye care through digital equipment and telecommunications technology. It offers some unique advantages, such as the ability to be integrated with electronic health records, the ability to be viewed by multiple members of the health care team, and potentially reduce wait times and travel times to the ophthalmologist. However, there is no comparison known to the study team between whether patients being referred from optometrists to retina specialists through a teleophthalmology system will be treated earlier than patients through a conventional fax system. This study aims to examine and provide more information on this topic.

This open-label, Phase IV prospective, observational study will evaluate patients, who have been diagnosed with Neovascular Age-Related Macular Degeneration and have previously received either a standard intravitreal injection of ranibizumab or aflibercept, in order to get and compare information regarding post-injection inflammatory (irritation in the eye)2-3 days post-injection. Additionally, patients will be evaluated for visual acuity and pain 2-3 days post-injection.

To assess the five-year incidence of AMD in a population from the central region of Portugal, previously phenotypically characterized.