Figure 4

Development of a cilioretinal vein (CV). (A) Right optic nerve head of a 49-year-old woman with the retinal vein at 4 o’clock draining into the central vascular trunk (arrowheads). Axial length is 29.9 mm. (B) Eight years later, the same retinal vein (arrowheads) has changed its course and exits in a newly acquired (glaucoma-related) pit of the optic nerve head at the nasal optic disc border at 3 o’clock, separated from the central vascular trunk. Note: Far advanced glaucoma-like optic nerve damage with kinking of the retinal vessels close to the disc border. (C) Fluorescein angiogram at the initial visit shows that the inferonasal retinal vein being continuous with the central vascular trunk (arrowheads). (D) Indocyanine green angiogram 8 years later shows that the inferonasal retinal vein had changed its course and left the eye at the nasal optic disc border (arrowheads).