1. From the Centre for Vision Research, Department of Ophthalmology and the Westmead Millennium and Save Sight Institutes, the University of Sydney (J.J.W., P.M., H.L., E.R.), Australia; Singapore National Eye Center and National University of Singapore (T.Y.W.), Singapore; and the Department of Ophthalmology and Visual Science, University of Wisconsin-Madison (R.K.), Wis.