View clinical trials related to Vision, Low.
Filter by: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.
The purpose of this study is to evaluate possible mechanisms of central visual loss in patients with diabetes mellitus. The visual loss of interest to be investigated is that associated with macular edema (prior to and following laser photocoagulation treatment) and that associated with panretinal photocoagulation. The evaluation will be performed with psychophysical testing, i.e., static perimetry and contrast sensitivity function. Of particular interest, the mechanisms of visual loss associated with macular edema (prior to and following laser photocoagulation) will be further investigated. Photoreceptor-mediated visual loss will be assessed by measurements of the Stiles-Crawford effect. Visual loss mediated by post-receptoral retinal changes will be assessed by measuring the Westheimer spatial desensitization/sensitization effect.