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.
Hon Y, Cheung SW, Cho P, Lam AK.Hon Y, et al.Ophthalmic Physiol Opt. 2012 Jul;32(4):349-54. doi: 10.1111/j.1475-1313.2012.00920.x. Epub 2012 Jun 1.Ophthalmic Physiol Opt. 2012.PMID: 22671032
Li T, Tian L, Wang L, Hon Y, Lam AK, Huang Y, Wang Y, Zheng Y.Li T, et al.J Biomed Opt. 2015 May;20(5):56006. doi: 10.1117/1.JBO.20.5.056006.J Biomed Opt. 2015.PMID: 25992846Free article.