1. Department of Ophthalmology, Great Ormond Street Hospital for Children National Health Service Trust, and2Department of Visual Science, Institute of Child Health, London, United Kingdom; and the
2. From the Department of Neurology, Department of Veterans Affairs Medical Center and University Hospitals, Case Western Reserve University, Cleveland, Ohio; the
3. Institute of Neuroscience, Faculty of Neuroscience, Plymouth University, Plymouth, United Kingdom.