Submitted for Publication: March 31, 2011; final revision received June 6, 2011; accepted June 13, 2011.
Published Online: August 8, 2011. doi:10.1001/archophthalmol.2011.247
Author Contributions: Drs van der Meulen, Patel, McLaren, and van den Berg had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Financial Disclosure: Dr Lapid-Gortzak has been a consultant for Alcon and received speaker's fees from Alcon, Simovision, and Oculentis. Dr van den Berg is the inventor of C-Quant, as listed on a patent held by the Royal Academy, Amsterdam, the Netherlands.
Funding/Support: This work was supported in part by Research to Prevent Blindness (an unrestricted grant to the Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, and Dr Patel as an Olga Keith Wiess Special Scholar) and the Mayo Foundation, Rochester.
Role of the Sponsors: The funding organization had no role in the design or conduct of this research; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.
Online-Only Material: This article is featured in the Archives Journal Club. Go to here to download teaching PowerPoint slides.