@inbook{57716870,
author={Eric F. Reichman},
title={Chapter 156. Intraocular Pressure Measurement (Tonometry)},
booktitle={Emergency Medicine Procedures, 2e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2013},
url={accessemergencymedicine.mhmedical.com/content.aspx?aid=57716870}
}