An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Konstantakopoulou E, Reeves BC, Fenerty C, Harper RA.Konstantakopoulou E, et al. Among authors: harper ra.Optom Vis Sci. 2008 Jul;85(7):538-42. doi: 10.1097/OPX.0b013e31817dad6a.Optom Vis Sci. 2008.PMID: 18594346
Gray TA, Fenerty C, Harper R, Lee A, Spencer AF, Campbell M, Henson DB, Waterman H.Gray TA, et al.Eye (Lond). 2010 Dec;24(12):1777-86. doi: 10.1038/eye.2010.121. Epub 2010 Sep 10.Eye (Lond). 2010.PMID: 20829888