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) and (B) Semiautomated measurement of retinal vessel caliber from fundus photos using the program VesselMap2. Measurements are taken from vessels passing through an annular zone 0.5 to 1 disc diameter away from the margin. (C) and (D) Measurement of retinal vessel pulsation amplitudes from video fundoscopy using the DVA.
