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.
(A) FFSS 2. Fluid-filled space is diffuse and extends posteriorly beyond the field of the image view. (B) FFSS 1. Fluid-filled space is limited. (C) FFSS 0. No fluid-filled space is observed. Asterisks indicate fluid-filled spaces.
