Changes in choroidal thickness after intravitreal dexamethasone implant injection in retinal vein occlusion

AimsTo investigate the choroidal thickness changes in eyes with retinal vein occlusion (RVO) and to determine the effect of an intravitreal dexamethasone implant (Ozurdex) on choroidal thickness.MethodsThis study comprised 47 patients diagnosed with unilateral, RVO-associated macular oedema (MO) and treated with Ozurdex. Baseline subfoveal choroidal thickness (SFCT) and central macular thickness (CMT) of the RVO eyes were compared with those of the normal contralateral eyes; serial changes in this parameter were evaluated at 1, 3 and 5 months after Ozurdex injection. The correlation between SFCT and CMT and between visual acuity change and SFCT or CMT changes were also investigated.ResultsThe mean SFCT was significantly higher in RVO eyes at baseline (260.3±71.2 μm) than it was in contralateral eyes (217.6±55.3 μm; p