1. From the University of Pittsburgh Medical Center Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; the
2. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts; the4Institute of Physics, Nicolaus Copernicus University, Torun, Poland; and the
3. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts; the
4. New England Eye Center, Tufts-New England Medical Center, Tufts University School of Medicine, Boston, Massachusetts.