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.
Polden M, Crawford TJ.Polden M, et al. Among authors: crawford tj.Vision (Basel). 2023 May 1;7(2):38. doi: 10.3390/vision7020038.Vision (Basel). 2023.PMID: 37218956Free PMC article.