We present the case of an 85-year-old woman who presented with red eyes bilaterally. The right eye had been red for 2 months, and the left one for a shorter time. The ophthalmologic examination showed severely congested episcleral vessels in both eyes, reduction of visual acuity, hyperemia of iris vessels, and pigment epithelium detachment. Ocular tension was within normal range. Both eyes showed impaired ocular movement, and the left eye had an abducens paresis. Our strong suspicion of carotid-cavernous sinus fistula was confirmed through a computed tomographic perfusion study; the previously conducted magnetic resonance examination of the cerebrum was without result.