Published Online: October 24, 2013. doi:10.1001/jamaophthalmol.2013.5297.
Study concept and design: Mottet, Aptel, Romanet, Pépin, Chiquet.
Acquisition of data: Mottet, Aptel, Hubanova, Chiquet.
Analysis and interpretation of data: Mottet, Aptel, Pépin, Chiquet.
Drafting of the manuscript: Mottet, Aptel, Pépin, Chiquet.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Mottet, Aptel, Pépin.
Obtained funding: Aptel, Romanet, Chiquet.
Administrative, technical, or material support: Mottet, Aptel, Romanet, Pépin, Chiquet.
Study supervision: Mottet, Aptel, Romanet, Pépin, Chiquet.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by Association de Recherche et de Formation en Ophtalmologie (ARFO) (Grenoble).
Role of the Sponsor: The funding organization had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We thank Claude Gronfier, PhD, for methodological advice using the nonlinear least squares, dual-harmonic regression analysis and Nathalie Arnol, MSc, for statistical advice.