Author Contributions: Dr Etminan had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Etminan, Forooghian, Brophy, Maberley.
Acquisition of data: Etminan, Maberley.
Analysis and interpretation of data: Etminan, Forooghian, Brophy, Bird, Maberley.
Drafting of the manuscript: Etminan, Forooghian, Maberley.
Critical revision of the manuscript for important intellectual content: Etminan, Forooghian, Brophy, Bird, Maberley.
Statistical analysis: Etminan.
Obtained funding: Etminan, Maberley.
Administrative, technical, or material support: Etminan, Forooghian, Brophy, Maberley.
Study supervision: Forooghian, Brophy, Bird, Maberley.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: The study was funded by the Canadian National Institute for the Blind.
Role of the Sponsors: The Canadian National Institute for the Blind did not have a role in the design and conduct of the study; in the collection, management, analysis, or interpretation of the data; or in the preparation, review, or approval of the manuscript.
Disclaimer: This study represents the opinions of the authors and not those of the US Food and Drug Administration.