Purpose Cerebrovascular accidents are a leading cause of morbidity and mortality in the United States. Long-term neurologic deficits are commonly seen in stroke patients that dramatically influence quality of life. If the stroke occurs posterior to the optic chiasm, patients can suffer from homonymous hemianopia. The loss of central vision on one side in both eyes causes many basic tasks, such as reading, to be severely limited or impossible. Visual rehabilitation of the lost vision, notably the central vision, would significantly improve quality of life.
Methods Three patients with documented homonymous hemianopia at least 6 months after a stroke were recruited for treatment. Each patient received five pre- and post-treatment examinations to specifically localize brain lesions, measure baseline activity, and then determine change from baseline: an ophthalmic examination, a neurologic examination, electro-oculography, eletroencephalography, and functional MRI. The treatment included 100 trials of the Luebeck Computer Software at the subjects' homes on their personal computers.
Results Complete analysis of the treatment is pending as patients are currently finishing the post-treatment examinations. However, preliminary evaluation into the data suggests a 2° to 3° increase in visual field perception in the lost central fields using Amsler grids and Humphrey visual field examinations.
Conclusions Visual rehabilitation of lost central field occurs with the use of the Luebeck Computer Software. Treatment periods with greater than 100 trials may lead to greater range of rehabilitation, providing a simple and cost-effective method to better quality of life for stroke patients.
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