PMC5574251_01
USG B-scan of the left eye showing shallow 360 degree of serous choroidal detachment.
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F1
USG-B scan was done which revealed thickened extraocular muscles with optic nerve head cupping, shallow 360 degree choroidal detachment with no evidence of mass lesion, and a dilated superior ophthalmic vein on the left side (Figure 1 (Fig. 1)).
Digital subtraction angiogram confirming an indirect type D carotid cavernous fistula with communication between cavernous sinus and the dural branches of left (a) external carotid artery (b) and internal carotid artery.
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F2
A four vessel angiogram revealed type D CCF (Figure 2 (Fig. 2)).
Visual evoked potential with normal P100 amplitude and latency in the right eye and grossly diminished P100 amplitude and latency in the left eye.
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F3
P100 amplitude and latency in OD and grossly diminished P100 amplitude and latency in OS (Figure 3 (Fig. 3)). Perimetry was performed in OD to document the visual field loss.