1. From the Hamilton Glaucoma Center and the
2. Institute for Neural Computation, University of California, San Diego, La Jolla, California; the
3. Institute for Neural Computation, University of California, San Diego, La Jolla, California; the3Computational Neurobiology Laboratories, The Salk Institute, La Jolla, California; and
4. From the Hamilton Glaucoma Center and the4VA San Diego Health Services, San Diego, California.