Departments of Clinical Neurosciences and Surgery (FC), Cumming School of Medicine, University of Calgary, Calgary, Canada; Casey Eye Institute (JF), Oregon Health and Science University, Portland, Oregon; Blanton Eye Institute (AGL), Houston Methodist Hospital, Houston, Texas; and Department of Ophthalmology and Visual Sciences (GPVS), Washington University in St. Louis School of Medicine, St Louis, Missouri.

Address correspondence to Gregory P. Van Stavern, MD, Department of Ophthalmology and Visual Sciences, Washington University in St. Louis School of Medicine, St Louis, MO 63110; E-mail: [email protected]

The authors report no conflicts of interest.