From the Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong (Wan); Department of Ophthalmology, Hong Kong Sanatorium and Hospital, Hong Kong (Chang); Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania (Jhanji).

Corresponding author: Kelvin H. Wan, MBChB, FICO, Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong. Email: [email protected].

Disclosures: None of the authors has a financial or proprietary interest in any material or method mentioned.

First author:Kelvin H. Wan, MBChB, FICODepartment of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, China

The study was supported by the S.K. Yee Medical Foundation.