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.
Regions of interest within the macula. Red circle indicates region of interest 1; blue ring indicates region of interest 2. The peripheral radius of each region is indicated by the distance in millimeters from the foveola. The red square indicates the foveola.
