Feasibility Test of Virtual Reality Obstacle Detection for Low Vision Walking
HemianopsiaHomonymous Hemianopia5 moreThe investigators are developing a new test of pedestrian hazard detection in virtual reality (VR) head-mounted display (HMD) headset, which shows virtual oncoming pedestrians in 3D while subjects are walking in real-world environment, for evaluation of visual field expansion to improve mobility in people with visual field loss.
Feasibility Tests for Various Prism Configurations for Visual Field Loss
HemianopiaHomonymous5 moreThe investigators will develop and test different configurations of high-power prisms to expand the field of vision of patients with visual field loss to assist them with obstacle detection when walking. The study will involve multiple visits (typically four) to Schepens Eye Research Institute for fitting and testing with the prism glasses. The overall objective is to determine best designs and fitting parameters for implementation in prism devices for future clinical trials.
Visual Rehabilitation in Children With Homonymous Hemianopia: a Pilot Study on Virtual-reality Stimulation...
HemianopiaBrain Tumor2 moreThere are currently no visual rehabilitation strategies for children presenting visual field defects consecutive to a brain tumor or its treatment. This study seeks to investigate the use of a home-based stimulation visual rehabilitation program using immerse-virtual reality (IVR) in children aged 4-10 years old with a diagnosis of hemianopia
VR System for Cross-modal Rehabilitation of Hemianopia
HemianopiaHomonymous2 moreThe purpose of this research study is to investigate the effectiveness of a new rehabilitation for visual hemianopia. The study team believes a cross-modal rehabilitation technique delivered by a virtual reality system can help restore the visual field for subjects with homonymous hemianopia.
Visual Perceptual Learning for the Treatment of Visual Field Defect
Visual Fields HemianopsiaHemianopsia1 moreThis study evaluates the efficacy of visual perceptual learning for the treatment of visual field defect caused by brain damage. Half of participants will receive visual perceptual training using the Nunap Vision, while the other half will receive sham training using the Nunap Vision-C.
Visual Restoration for Hemianopia
Stroke Induced Vision LossHemianopia1 moreThe purpose of this research is to assess the efficacy of a visual training task on reducing the size of a visual field deficit caused by brain damage in adults, and its ability to improve visual functions in this patient population.
Restoration vs. Compensation in Neurovisual Rehabilitation of Visual Field Defects
HemianopiaBrain Injuries1 moreVisual field defects (VFD) are a frequent effect of cerebral lesions especially after posterior cerebral artery stroke. The present study was conducted to compare effects of vision restoration training (VRT) and compensation training (Visual Exploration Training, VET) on visual field performance.
The Use of Transcranial Direct Current Stimulation (TDCS) to Enhance the Rehabilitative Effect of...
HemianopiaQuadrantanopia2 moreThe purpose of our study is to explore the efficacy of combination of brain stimulation with visual rehabilitation in patients with visual field loss resulting from brain lesions. It is shown that the effect of sensorimotor training of hand can be enhanced in patients with stroke using brain stimulation. We decided to explore this combination for visual field loss because visual dysfunction following brain lesions is considered intractable. We hypothesize that combination of noninvasive brain stimulation, in the form of transcranial direct current stimulation (tDCS), with visual rehabilitation would have greater efficacy than visual rehabilitation alone.
Vision Loss Impact on Navigation in Virtual Reality
StrokeIschemic13 moreThe purpose of this research is to better understand the impact of cortically-induced blindness (CB) and the compensatory strategies subjects with this condition may develop on naturalistic behaviors, specifically, driving. Using a novel Virtual Reality (VR) program, the researchers will gather data on steering behavior in a variety of simulated naturalistic environments. Through the combined use of computer vision, deep learning, and gaze-contingent manipulations of the visual field, this work will test the central hypothesis that changes to visually guided steering behaviors in CB are a consequence of changes to the visual sampling and processing of task-related motion information (i.e., optic flow).
Combined tDCS and Vision Restoration Training in Subacute Stroke Rehabilitation: A Pilot Study
HemianopiaStrokeThe purpose of this Study is to determine whether non-invasive transcranial direct current stimulation (tDCS) is effective in increasing rehabilitation effects after stroke in visual Cortex.