Fig. 2
From: Optical coherence tomography angiography in dural carotid-cavernous sinus fistula
Optical coherence tomography angiography disclosing increased blood flow in the congested episcleral venous network in the temporal quadrant of the eye. Although the superficial conjunctival vessels are mildly dilated (a), most of the increased flow is detected on the B-scan (indicated by the intense red areas on the B-scan, right) in the episcleral venous plexus (b). There are virtually no dilated vessels in the deeper scleral areas (c)