Monozygotic twins (aged 63 years old), with group-2A idiopathic juxtafoveolar retinal telangiectasia (JXT), underwent clinical examination, fluorescein angiography (FA) and optical coherence tomography (OCT). Twin 1: Right fundus showed right-angled venules temporal to the fovea; FA demonstrated retino-retinal anastomosis and intraretinal leakage. Twin 2: Fundoscopy revealed right-angled venules in both eyes. OCT demonstrated foveal cysts in all eyes. This is the third set of monozygotic twins with group-2A JXT that has been reported in the literature, further supporting a genetic predisposition for JXT. The twin who smoked had more severe disease, suggesting that smoking is a risk factor for progression. OCT is useful in the detection and monitoring of these patients.

Group-2A JXT is characterised by bilateral regions of retinal thickening …