Author Contributions: Dr Khor had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Khor, Aung, Saw, Wong, Tambyah, D. Tan.
Acquisition of data: Khor, Aung, Tambyah, A.-L. Tan, L. Lim, Chan, Heng, J. Lim, Loh, Lee.
Analysis and interpretation of data: Khor, Aung, Saw, Wong, Tambyah, Beuerman, Chan, Lee, D. Tan.
Drafting of the manuscript: Khor, Aung, Saw, Wong, Tambyah, Chan, J. Lim, Loh, D. Tan.
Critical revision of the manuscript for important intellectual content: Khor, Aung, Saw, Wong, Tambyah, A.-L. Tan, Beuerman, L. Lim, Heng, Lee, D. Tan.
Statistical analysis: Aung, Saw, Wong.
Obtained funding: D. Tan.
Administrative, technical, or material support: Khor, Aung, Saw, Tambyah, Beuerman, Heng, J. Lim, Loh, Lee, D. Tan.
Study supervision: Aung, Saw, L. Lim, Heng, D. Tan.
Financial Disclosures: None reported.
Funding/Support: The funding and administrative support for this study was provided by the Singapore Eye Research Institute.
Role of the Sponsor: The Singapore Eye Research Institute is a government-funded national institution. No commercial sponsorship was involved in the design and conduct of the study, collection, management, analysis, and interpretation of the data, nor in the preparation, review, or approval of the manuscript.