Non-arteritic anterior ischemic optic neuropathy combined with branch retinal vein obstruction: A case report.

Background: Non-arteritic anterior ischemic optic neuropathy (NAION) is an independent disease characterized by edematous optic discs. In eyes with branch retinal vein occlusion (BRVO), the arteries and veins in the ethmoid plate of the optic disc are relatively crowded; however, a combination of the two is clinically uncommon. Herein, we reported a patient with NAION and concealed BRVO, for which the treatment and prognosis were not similar to those for NAION alone.

Case Summary: Herein, we report a case of NAION with concealed BRVO that did not improve with oral medication. A week later, we switched to intravenous drug administration to improve circulation, and the patient's visual acuity and visual field recovered. Hormonal therapy was not administered throughout the study. This case suggested that: (1) Fundus fluorescein angiography (FFA) can help detect hidden BRVO along with the NAION diagnosis; (2) intravenous infusion of drugs to improve circulation has positive effects in treating such patients; and (3) NAION with concealed BRVO may not require systemic hormonal therapy, in contrast with the known treatment for simple NAION.

Conclusion: NAION may be associated with hidden BRVO, which can only be observed on FFA; intravenous therapy has proven effectiveness.