View clinical trials related to Vision, Low.
Filter by:Age related macular degeneration (AMD) is the leading cause of vision loss in patients older than 55 years old. AMD can present as dry AMD or wet AMD. In most cases AMD affects both eyes although in many cases it's asymmetrical as far as severity. Some patients require low vision aids to continue their daily life tasks. In the past a few attempts were made to use low vision intraocular lenses with corrective glasses without enough success. In addition telescopic and prismatic lenses were also tried. The difficulties with these lenses included low field of vision, unsatisfactory magnification, complicated surgical technique and high complication rates. Recently an add on lens was designed for the sulcus for implantation in pseudophakic AMD patients. The add on lens doubles the magnification of the central image dependent on the reading distance and the anatomy of the eye. The lens is acrylic hydrophobic and designed for implantation in the sulcus either in pseudophakic patients or in addition to an intraocular lens implanted during a routine cataract surgery. The lens is 13 mm wide with 4 symmetric haptics. The lens has 1.5 mm central part of 10 diopters and the rest of the lens has no optical power. Our purpose is to study implantation of the lenses in AMD patients to improve their reading ability and to improve their daily living.
This study serves to test a previously evaluated falls prevention intervention recommended by the Centers for Disease Control and Prevention, entitled the Study of Accidental Falls in the Elderly (SAFE) Health Behavior and Exercise Intervention, to evaluate if the intervention is accessible to older adults with low vision receiving services from the Southeastern Blind Rehabilitation Center (SBRC). This study also serves to pilot a version of the SAFE intervention that has been adapted to be accessible for individuals with low vision at SBRC.
This study will evaluate the use of autologous bone marrow derived stem cells (BMSC) for the treatment of retinal and optic nerve damage or disease.
The goal of this study is to examine the ability of optical head‐mounted display technology to enlarge the visual field of patients with severe visual field loss due to retinal dystrophy and to improve mobility and patient‐reported outcomes.
This pilot study aims to assess the interest to add an auditory pathway morphological analysis during the MRI exploration of visual pathway in visually impaired children.
Amblyopia is a significant health problem, affecting up to 4% of the population in the United States. Amblyopia, commonly known as "lazy eye," is a developmental visual disorder in which one or both eyes suffer from poor vision as a result of being disadvantaged in early life. Strabismus, or eye misalignment, such as crossed eyes (esotropia) or wandering eyes (exotropia), and anisometropia, or a power difference between the eyes, are the most common causes of amblyopia. If conventional treatment, such as patching the better seeing eye, is not initiated during the critical period of visual development, lasting visual impairment may persist throughout life. This critical period of visual development has been thought to end around age 10. However, recent research has demonstrated that the critical period of visual development can be extended into adulthood. Complete light deprivation in animal models has restored plasticity in the visual cortex and has demonstrated drastic recovery of vision in amblyopic eyes. The objective of this pilot study is to evaluate the impact of complete light deprivation on visual function in a cohort of human adults with severe amblyopia from anisometropia.
The "eSight Quality of Life and Efficacy Study" (eQUEST) is a prospective cohort study intended to demonstrate the functional vision and Quality of Life (QoL) improvement provided by eSight Eyewear to persons with significant visual impairment resulting from various eye conditions. The multi-site study will evaluate the efficacy of the eSight device for various Activities of Daily Living (ADLs) across a broad range of subject ages and disease types.
The Baltimore Reading and Eye Disease Study (BREDS) is a two year study to determine the prevalence of vision problems in an early school age population with reading difficulty. Comprehensive vision and reading tests will be administered to 400 students at participating schools in the Baltimore City Public School system. A secondary goal is to examine the impact of vision treatment on reading performance. Children with refractive error or convergence insufficiency will be provided treatment free of charge. The investigators will evaluate the impact that the treatment has on vision function and reading performance.
The overall goal of this research proposal is the early prediction of the emergence of CVI and its characteristics on the basis of neuroimaging data. The different steps that will be taken to achieve this goal will be: 1. To characterize CVI deficits in children; 2. To correlate the CVI characteristics with their motor profiles; 3. To characterize brain lesions in children with CVI; 4. To link the motor profile, CVI profile and brain metrics of the children. Over the last 10 years, 488 children with and without CP have consulted at the CVI clinic in Leuven. All these children had a comprehensive visual perceptual assessment, cognitive evaluation and an ophthalmological assessment. Summarizing these data results in a quantitative visual perceptual profile for each individual patient. The goal is to prospectively extend this database to a number of 600 children. The project's primary objective is to relate the presence of CVI to the motor profiles of these children. Of these 488 children, 300 have an MRI available. The goal is to analyze the retrospective MRI data of this clinical group and to prospectively extend this database by reassuring newly registered children will receive MRI with DTI. This will allow the investigation of the correlation between the brain metrics and the CVI characteristics in a large cohort.
Low vision patients have difficulty acquiring sufficient visual information in a timely manner for the purpose of performing challenging daily tasks, such as traveling independently and safely through busy streets. The advance of virtual reality techniques has provided a potential platform for training low vision patients to use their remaining vision more efficiently, but the key issue is always whether the patient's visual experiences in a virtual world can be transferred to the real world. The proposed study is designed to provide definite answer to this question.