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.
SEM showing extensive cavernous atrophy of the optic nerve. (A) SEM showing extensive cavernous atrophy of the optic nerve with an intact subarachnoid space. (B) higher magnification SEM of cavernous atrophy of the optic nerve with a wall of intact glial tissue surrounding this area (upper portion of image).
Abbreviation: SEM, scanning electron microscope.
