Submitted for Publication: March 31, 2013; final revision received August 2, 2013; accepted August 13, 2013.
Published Online: January 16, 2014. doi:10.1001/jamaophthalmol.2013.7623.
Study concept and design: All authors.
Acquisition of data: Cheng, Woo.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Cheng, Woo.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Cheng, Woo.
Obtained funding: Cheng, Woo, Drobe.
Administrative, technical, and material support: All authors.
Study supervision: Cheng, Schmid.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was funded in part by Essilor International of France, which supplied the bifocal lenses used in this study.
Role of the Sponsor: Essilor International had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.