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.
Montage optical coherence tomography angiography image of the optic disc and macula in a patient with diabetic retinopathy. Vascular changes are shown, including enlarged foveal avascular zone, optic disc neovascularization (long arrow), macular neovascularization (short arrow), microvascular tortuosity (arrowhead), and extensive capillary nonperfusion (star).
