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.
Trible JR, Costa VP, Sergott RC, Spaeth GL, Smith M, Wilson RP, Katz LJ, Moster MR, Schmidt CM.Trible JR, et al.Trans Am Ophthalmol Soc. 1993;91:245-61; discussion 261-5.Trans Am Ophthalmol Soc. 1993.PMID: 8140694Free PMC article.Clinical Trial.