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.
Lee JW, Chan CW, Wong MO, Chan JCh, Li Q, Lai JS.Lee JW, et al. Among authors: chan jch, chan cw.Clin Ophthalmol. 2014 Sep 25;8:1987-92. doi: 10.2147/OPTH.S70903. eCollection 2014.Clin Ophthalmol. 2014.PMID: 25284983Free PMC article.