Submitted for Publication: June 22, 2010; final revision received October 20, 2010; accepted November 19, 2010.
Financial Disclosure: Dr Zangwill received research support from Heidelberg Engineering and Carl Zeiss. Dr Weinreb received research support from Optovue, Topcon, and Carl Zeiss and support from Heidelberg Engineering and honoraria from Topcon. Dr Sample received research support from Carl Zeiss, Heidelberg Engineering, and Welch Allyn. Dr Medeiros received research support from Carl Zeiss and honoraria from Carl Zeiss and Heidelberg Engineering.
Funding/Support: This study was supported in part by grants BEX1327/09-7 from CAPES Ministry of Education, Brazil (Dr Leite) and EY08208 (Dr Sample) and EY11008 (Dr Zangwill) from the National Eye Institute. Participant retention incentive grants in the form of glaucoma medication at no cost were provided by Alcon Laboratories Inc, Allergan, Pfizer Inc, and Santen Inc.
Role of the Sponsor: Alcon Laboratories Inc, Allergan, Pfizer Inc, and Santen Inc had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.