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.
Chowers I, Livni N, Frucht-Pery J, Pe'er J.Chowers I, et al.Ophthalmic Res. 1999;31(3):210-2. doi: 10.1159/000055534.Ophthalmic Res. 1999.PMID: 10224504