Clinical Trial: Restoration of Vision After Stroke
Study Status: Not yet recruiting
Recruit Status: Not yet recruiting
Study Type: Interventional
Official Title: Electrical Stimulation for Restoration of Vision After Stroke in the Damaged Visual Field of Patients With Unilateral Stroke (REVIS Helsinki)
Brief Summary: Occipital stroke is associated with homonymous visual field defects (occurring on one side of the visual field). Despite spontaneous recovery, some degree of defect is often permanent. Currently, no treatment exists for such visual field defects.The purpose of this study is to test the efficacy of a type of electrical brain stimulation method, transcranial alternating current stimulation, in reducing these type of visual field defects in their chronic stage.
Detailed Summary:
Sponsor: Helsinki University Central Hospital
Current Primary Outcome: Improved detection in the visual field defined as the percentage change of the stimulus detection rate in High-resolution perimetry (HRP) [ Time Frame: Change between 3-7 days pre-treatment, at 3-7 days post-treatment, and at 2 months post-treatment ]
HRP is a computer-based perimetry using a supra-threshold stimulus. It is used to detect residual vision between the absolute defect and seeing field and to monitor subtle changes in perceptual ability. HRP is performed in fixation control using an eye tracker.
The primary outcome measure will be the percentage change in HRP detection accuracy between pre-test and post-test measurements.
Original Primary Outcome: Same as current
Current Secondary Outcome: The change in extent of visual fields in standard automated perimetry [ Time Frame: Change between 3-7 days pre-treatment, at 3-7 days post-treatment, and at 2 months post-treatment ]
Original Secondary Outcome: Same as current
Information By: Helsinki University Central Hospital
Dates:
Date Received: February 6, 2015
Date Started: April 2015
Date Completion: June 2017
Last Updated: March 27, 2015
Last Verified: March 2015
