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Purpose: To evaluate and compare the clinical and angiographic characteristics of retinal vein occlusion (RVO)in glaucomatous and non-glaucomatous eyes with unilateral RVO in the fellow eye. Methods: Twenty-one glaucomatous eyes (GL group) and 25 age-matched non-glaucomatous eyes (non-GLgroup) with unilateral RVO in the fellow eye were included in this study. Fluorescein angiographic images wereassessed in both groups by 3 retina specialists in order to determine the RVO occlusion site. The occlusionsite was divided into 2 types: arteriovenous (AV)-crossing and non-AV-crossing (optic cup or optic nerve sited). The clinical characteristics and prevalence of AV-crossing and non-AV-crossing RVO were comparedbetween the 2 groups. Results: The mean baseline intraocular pressures of the RVO eye and the fellow eye did not differ between the2 groups (RVO eye: 14.3 ± 2.5 mmHg [non-GL group], 15.5 ± 3.9 mmHg [GL group], p = 0.217; fellow eye: 14.4± 2.5 mmHg [non-GL group], 15.7 ± 3.7 mmHg [GL group], p = 0.148). The prevalence of systemic disease didnot differ between the 2 groups (e.g., diabetes mellitus and hypertension, p = 0.802 and 0.873, respectively). AV-crossing RVO was significantly more frequent in the non-GL group (19 eyes; 76%) than in the GL group (4eyes, 19%, p < 0.001). Conclusions: Non-AV-crossing RVO, i.e., optic cup- or optic nerve-sited RVO, is more frequently associatedwith glaucomatous changes in the fellow eye. Therefore, this type of RVO should be monitored more carefullyfor indications of glaucoma in the fellow eye.
