Uncommon Ophthalmic Artery Involvement in Spontaneous Vertebral Artery Dissection in a Young Woman With Optic Neuritis: A Case Report and Literature Review.

We report a 36-year-old healthy woman with 2 days of right-sided blurry vision, headache, and pain with eye movement. Exam showed decreased visual acuity, focal retinal pallor, and abnormal cranial nerve II findings. CTA revealed right vertebral artery dissection at C5-C6 with concurrent ophthalmic artery narrowing. She received anticoagulation, intravenous steroids for optic neuritis, and improved with follow-up. This rare presentation underscores the need to consider cervical artery dissection in young patients with painful vision loss and subtle fundoscopic changes, as timely vascular imaging can reveal unexpected concurrent pathology.