Footnotes

• ▸ Additional data are published online only. To view these files please visit the journal online (http://dx.doi.org/10.1136/bjophthalmol-2011-301444)

• Contributors Contributed to study design, recruited participants, managed imaging centre, contributed to analysis, wrote paper and provided final approval. GS contributed to study design, recruited participants, managed imaging centre, contributed to analysis, wrote paper and provided final approval. KK study statistician, provided final approval. CT contributed to study design, data analysis and interpretation, provided input in writing paper and final approval. RB contributed to study design, data analysis and interpretation, provided input in writing paper and final approval.

• Funding The research was supported by Pfizer Inc, New York, New York, USA. The study sponsor participated in the study design, analysis and interpretation of the data, the writing of the report and the decision to submit the paper for publication.

• Competing interests Dr Chakravarthy has been an investigator in multiple Pfizer sponsored clinical trials and studies. She has also participated in Pfizer sponsored medical advisory boards. Mr Kwok and Dr Tressler are employees of Pfizer Inc. Dr Buggage was an employee of Pfizer Inc at the time the study was conducted.

• Ethics approval Ethics Committees.

• Provenance and peer review Not commissioned; externally peer reviewed.

• Data sharing statement A summary of the imaging data are available upon request to Pfizer Inc.