Submitted for Publication: March 8, 2013; final revision received November 17, 2013; accepted December 8, 2013.
Published Online: February 13, 2014. doi:10.1001/jamaophthalmol.2013.7971.
Study concept and design: Lam.
Acquisition of data: Lam, Vandenbroucke, Rosa.
Analysis and interpretation of data: Lam, Feuer, Schiffman, Porciatti, Gregori.
Drafting of the manuscript: Lam, Feuer, Vandenbroucke.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Feuer, Schiffman.
Obtained funding: Lam.
Administrative, technical, or material support: Lam, Porciatti, Vandenbroucke, Rosa, Gregori.
Study supervision: Lam, Porciatti.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by National Eye Institute grants RO1EY014957 (Dr Porciatti), P30-EY014801 (Dr Porciatti), and R24EY018600 (Dr Guy), as well as by an unrestricted grant to Bascom Palmer Eye Institute from Research to Prevent Blindness.
Role of the Sponsor: The National Eye Institute approved the design and conduct of the study as part of its funding process. Research to Prevent Blindness had no direct role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.