View clinical trials related to Vision, Low.
Filter by:The research is aimed at developing and testing a new method of visual-motor rehabilitation of Veterans with macular degeneration by using inexpensive "tablet" computers at home.
Non-invasive brain stimulation can increase cortical excitability in the visual system, but it is not known if this is of clinical value. The investigators now assessed if repetitive, transcranial alternating current stimulation (rtACS) can improve visual field size in patients with optic nerve damage. The investigators hypothesized that rtACS would improve visual functions with the defective visual field sectors of the visual field (primary outcome measure).
Our team is interested in what can be done to improve the functioning of patients who suffer from glaucoma, a chronic and irreversible eye disease. Patients with vision loss as a result of this disease may feel like they have been 'given up on', or lost to our medical system when no further interventions can be offered to treat their eye disease. It is our intent to investigate what alternatives we can provide our patients, instead of simply saying, 'nothing more can be done'. We have learned from studies done on other chronic eye diseases, like age related macular degeneration, that low vision rehabilitation can improve visual function. What exactly is low vision? It can involve a loss of visual acuity, making activities such as reading or writing a challenge; it can involve loss of contrast sensitivity, making shapes and edges hard to discern, like those of a stair edge, or person's face. It could also involve a loss of peripheral, or side vision which is a symptom common to most glaucoma patients. Whatever the cause of low vision, doing day-to-day activities can become increasingly difficult, and many suffer from a loss of their independence and may even become depressed. Low vision rehabilitation involves helping patients to use their remaining vision in optimal, and sometimes even new, ways. This involves an assessment of a person's baseline vision, and an idea of what their needs are. Patients are then given low vision aids (such as magnifiers, telescopes, video screens which magnify images, and other tools) as well as instructions and support for adapting to living and functioning with altered vision. Although there currently exists no cure for glaucoma, and we are certainly not promising a reversal of the damage done to the eyes from this chronic disease, we do believe that these types of rehabilitation services may offer some hope and potential visual benefit to patients living with vision loss. Our hypothesis is that the use of state-of-the-art low vision aids in patients with advanced glaucomatous visual loss will provide an improvement in visual tasks and thereby an improvement in quality of life.
The purpose of this study is: 1. to develop a standardised orientation and mobility training (O&M-training) in the use of an identification/symbol cane by older adults with low vision, and; 2. to evaluate this newly developed standardised O&M-training with respect to effectiveness and feasibility in a randomised controlled trial.
Vision loss can result in feelings of frustration, helplessness, anxiety, depression, and anger, which compromise a person's activities of everyday living. While emotional distress may resolve in some persons without intervention, unmanaged and persistent distress places the person at risk for continued decrements in health status and the potential development of more severe conditions (i.e., depression, poor health outcomes). Persons with low vision will be recruited and randomly assigned to either an innovative, problem-solving training (PST) intervention group designed specifically for persons with low vision or a sham intervention/control group. Primary and secondary outcomes will be assessed at baseline prior to intervention and at 3 month follow-up, 7 month follow-up, 12 month follow-up, and 24 month follow-up by a research interviewer masked to participants' randomization. This project will: (1) demonstrate how specified physical and emotional outcomes of persons with low vision change across time, (2) evaluate the effectiveness of a PST intervention that will be delivered to persons with low vision; and (3) identify persons with low vision who are at risk for adverse emotional and health outcomes.
The purpose of Project Magnify is to determine which of the two current strategies (large print versus optical aids) for helping visually impaired students improve their reading abilities works better. Our hypothesis is that optical aids work better than providing the student with large print materials. Since large print materials are of one size only, and the level of visual impairments among students varies greatly, it seems apparent that large print materials will work well for some students, but not for all. An optical aid designed for each individual student's level of impairment seems to hold more promise in helping each student reach their maximum level of performance. Although Project Magnify is designed to increase reading abilities, it is expected that students will also develop greater independence and confidence in home and community activities that require the use of vision.
The purpose of this clinical trial is to determine if interventions within the nursing home to restore vision, or cope with visual loss, in residents with visual impairment result in improvement or less decline in mobility scores, and socialization scores, compared to residents with visual impairment in nursing homes with no such intervention. The investigators hypothesized that nursing home residents with visual loss who receive cataract surgery, or refractive correction, or low vision aids would have have better socialization scores and mobility scores at 6 months and 12 months compared to nursing home residents with visual impairment who are advised to seek services, but have no specific program.
The primary purpose of this research study is to evaluate the effectiveness of a new outpatient low vision rehabilitation program that is targeted to serve legally blind veterans with central vision loss. The hypothesis is that veterans in the treatment group will self-report less difficulty performing daily activities than veterans in the control group who are on a waiting list for VA low vision or blind rehabilitation programs.
1. Purpose a. Examination on Efficacy of Retina Projection System 2. Patients a. Low vision patients 3. Methods 1. Vision aids - Retina Projection System - Face-mounted video display as control 2. Comparison of Reading Speeds with both vision aids
There are two diseases in particular that may have serious consequences for driving and mobility due to their potentially severe impact on visual function: glaucoma and diabetic neuropathy. In this project we will develop predictive models of driving for these patients and will train them to use low-vision aids to improve driving mobility. We will determine how best to train patients with hemianopic field loss due to cerebral vascular accidents and identify predictors of long-term success in the use of low-vision aids.