Submitted for Publication: April 4, 2014; final revision received June 3, 2014; accepted June 5, 2014.
Published Online: August 28, 2014. doi:10.1001/jamaophthalmol.2014.3029.
Study concept and design: Beckman Rehnman, Behndig, Lindén.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Beckman Rehnman, Behndig, Hallberg.
Obtained funding: Beckman Rehnman, Behndig.
Administrative, technical, or material support: All authors.
Study supervision: Behndig, Hallberg, Lindén.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Hallberg was a former part-time employee at Bioresonator AB (>30 months ago). Bioresonator AB developed a tonometer based on resonance technique. No other conflicts were reported.
Funding/Support: This study was funded by grants from the Stiftelsen Fund (Kronprinsessan Margaretas Arbetsnämnd för synskadade), Ögonfonden, Västerbotten County Council (Avtalet om Läkares Forskning), Stiftelsen JC Kempes Minnes Stipendiefond, and European Regional Development Fund.
Role of the Funder/Sponsor: The sponsors had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.