@inbook{55786130,
author={Paul Riordan-Eva and Emmett T. Cunningham Jr},
title={Abbreviations & Symbols Used in Ophthalmology},
booktitle={Vaughan & Asbury's General Ophthalmology, 18e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2011},
url={accessmedicine.mhmedical.com/content.aspx?aid=55786130}
}