Ipsilateral monocular superior nasal quadrantanopsia

Clinical manifestation when a ophthalmic artery aneurysm enlarges and impinges the lateral portion of the optic nerve (inferior temporal fiber compression).

If the ophthalmic artery aneurysm continues to enlarge then an upward displacement of the optic nerve against the falciform ligament produce a monocular inferior nasal quadrantanopsia by superior temporal fiber compression.