Optociliary Shunt Vessels or Neovascularisation of the Optic Disc: Fluorescein Angiography Versus Optical Coherence Tomography Angiography.

A 56-year-old man with a history of gallbladder carcinoma, hypothyroidism and hypertension was examined by us after developing marked visual loss in his left eye. A left ischaemic type of central retinal vein occlusion (CRVO) with macular oedema was diagnosed. Three months later, a non-ischaemic type of CRVO with no macular oedema developed in his right eye. While the left eye received five intravitreal ranibizumab injections and panretinal photocoagulation, the right central retinal vein occlusion improved spontaneously without any treatment. Ten months after his first visit we noticed optociliary shunt vessel formation in the right eye and neovascularisation of the optic disc in the left eye. Fluorescein angiography and optical coherence tomography angiography were performed at the same visit. The place of fluorescein angiography and optical coherence tomography angiography in distinguishing the optociliary shunt vessel from neovascularisation of the optic disc is discussed.