Author Contributions: Dr Gekeler 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: Willmann, Gekeler.
Acquisition of data: Willmann, Fischer, Schatz, Schommer, Gekeler.
Analysis and interpretation of data: Willmann, Fischer, Schatz, Schommer, Gekeler.
Drafting of the manuscript: Willmann, Schatz, Gekeler.
Critical revision of the manuscript for important intellectual content: Willmann, Fischer, Schatz, Schommer, Gekeler.
Statistical analysis: Schatz.
Obtained funding: Willmann, Fischer, Gekeler.
Administrative, technical, or material support: Willmann, Fischer, Gekeler.
Study supervision: Willmann, Schatz, Schommer, Gekeler.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Gekeler reported serving as a consultant to Retina Implant AG. No other author reported disclosures.
Funding/Support: The study was supported by the Charles S. Houston Award from the Wilderness Medical Society. Heidelberg Engineering (Heidelberg, Germany) provided the confocal scanning laser ophthalmoscope.
Role of the Sponsor: The sponsor 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 Peter Bärtsch, MD (Department of Sports Medicine, Medical Clinic, University of Heidelberg, Heidelberg, Germany), for invaluable intellectual support during conception of our study, evaluation of data, and drafting of the manuscript. We also thank Faik Gelisken, MD (Centre for Ophthalmology, University of Tübingen, Tübingen, Germany), for critical review of our findings and grading of angiographies. Neither Dr Bärtsch nor Dr Gelisken received compensation for his contribution.