Cup-to-disc ratio in GLP-1 RA Associated Non-Arteritic Anterior Ischemic Optic Neuropathy.

This adds a useful anatomical dimension to the semaglutide-NAION story that has unsettled some GLP-1 users since 2024. The finding that GLP-1-exposed and unexposed NAION patients share the same crowded-disc anatomy suggests the underlying eye structure, not the drug alone, is the dominant risk factor — though the authors are explicit that this study cannot rule the drugs in or out as an independent contributor. For readers worried about the headlines, the practical takeaway is that a simple eye exam can stratify a risk that remains low in absolute terms.