====== Visual field defect from ophthalmic artery aneurysm ======

A [[ipsilateral monocular superior nasal quadrantanopsia]] arrives when the [[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.

Compression of the [[optic nerve]] near the [[chiasm]] may also produce a superior temporal quadrant defect in the contralateral eye ([[junctional scotoma]] "pie in the sky" defect) from injury to the anterior [[Wilbrand's knee]].