Eosinophilic Vasculitis and Arteritic Anterior Ischemic Optic Neuropathy Associated With Anti-PD-L1 Therapy

Immune checkpoint inhibitor therapy is frequently associated with immune-related adverse events, which occasionally manifest with visual symptoms. Here, we describe a case of unilateral and sudden-onset painless vision loss in an 82-year-old man with metastatic non–small cell lung cancer receiving immunotherapy with the anti–programmed death-ligand 1 agent atezolizumab. Examination demonstrated a right-sided relative afferent pupillary defect,...