Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
0.8-µm thick section of epoxy-resin embedded retina, choroid, and sclera; post-fixed with osmium tannic acid paraphenylenediamine and stained with toluidine blue stain; 84 yr old woman. Section passes through optic nerve head at the left and foveola in the center.
