1 Department of Opthalmology, Counties Manukau DHB and Auckland DHB (AG), Auckland, New Zealand; Department of Diagnostic Radiology, SingHealth Institution (ELCH, RCC), Singapore ; Massachusetts Eye and Ear (HRK), Boston, Massachusetts; Department of Diagnostic Radiology, Massachusetts General Hospital (HRK), Harvard Medical School, Boston, Massachusetts; and Duke Medical School (RCC), Singapore .