Comparison of Arteritis and Nonarteritic Anterior Ischemic Optic Neuropathies with the Heidelberg Retina Tomograph

This study is the first to demonstrate quantitatively an enlargement and excavation of the optic cup after an event of AAION, but not NAION. The eyes affected with AAION showed significant excavation and enlargement of the optic cup when compared with contralateral uninvolved eyes. All HRT-generated parameters showed changes consistent with increased enlargement and excavation of AAION-involved eyes. These changes were not observed in eyes that experienced an event of NAION.