Figure 3From: Alteration of choroidal thickness in a case of carotid cavernous fistula: a case report and a review of the literature Enhanced depth imaging optical coherence tomography (EDI-OCT) before and after treatment. Upper image: Prior to treatment, the subfoveal choroidal thickness is 297 μm (arrowheads). Lower image: After treatment, the subfoveal choroidal thickness decreased to 142 μm, which is almost half of the preoperative choroidal thickness (arrowheads).Back to article page