Fig. 1.
Progression of vision loss in open angle glaucoma. (a) Normal vision, (b) Early glaucoma, (c) Advanced glaucoma, (d) Extreme glaucoma.
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.