Neuro-Ophthalmology Expert Witness

The Medical-Legal Question

These cases typically ask whether an eye or systemic finding — a swollen optic nerve, a new double vision, a field cut — was recognized as the sign of underlying neurologic disease it was, and whether the required workup and referral happened in time. Because the underlying conditions include tumors, aneurysms, elevated intracranial pressure, and stroke, a missed neuro-ophthalmic sign can translate into injury far beyond the eye.

Recurring Case Types

• Papilledema and missed intracranial pathology. Papilledema is swelling of both optic nerve heads from elevated pressure inside the skull. It is visible on a routine dilated exam and is an examination finding that demands urgent neuroimaging and workup. Claims arise when disc swelling was not detected, was documented but not pursued, or when headaches were managed for months without fundus examination.
• Cranial nerve palsies and diplopia after trauma. The third, fourth, and sixth cranial nerves steer the eyes; injury to any of them causes misalignment and double vision (diplopia). After head trauma, the questions include which nerve was injured, whether the pattern fits the trauma, whether an underlying compressive lesion was excluded — a third nerve palsy with pupil involvement raises aneurysm until proven otherwise — and the prognosis for recovery or strabismus surgery.
• Visual pathway injuries. Damage behind the eyes — chiasm, optic radiations, visual cortex — produces characteristic field defects, such as loss of the same half of the field in both eyes (homonymous hemianopia). Mapping the defect localizes the lesion, which bears directly on causation in trauma and stroke cases.
• Giant cell arteritis. This inflammatory disease of medium and large arteries in patients generally over 50 can cause sudden, permanent blindness, and the second eye may follow the first within days if steroids are not started promptly. It is a true ophthalmic emergency, and litigation centers on whether classic symptoms — new headache, scalp tenderness, jaw pain with chewing, transient visual loss — prompted timely testing and treatment.

Distinguishing Ocular From Neurologic Visual Loss

A core skill in this area is localization: deciding whether visual loss arises in the eye, the optic nerve, or the brain. The tools are the pupil exam — a relative afferent pupillary defect (RAPD) indicates asymmetric optic nerve dysfunction — color vision testing, formal visual fields whose patterns localize the lesion, OCT (optical coherence tomography) of the nerve fiber layer, and neuroimaging. The same toolkit identifies non-organic vision loss, where reported deficits are inconsistent with objective structure and physiology. Field interpretation is covered in the primer on understanding visual fields, and optic nerve injury specifically on the optic nerve injury page.

Causation Considerations and Honest Limits

Temporal association is seductive in this area — visual symptoms after a car accident, a palsy after a procedure — but microvascular nerve palsies occur spontaneously in patients with diabetes and hypertension, and many field defects predate the event that brought them to attention. The analysis weighs the lesion's localization against the alleged mechanism, as outlined on the causation page. Prognostic statements about pathway injuries also carry real uncertainty, particularly early after injury, and a responsible report says so.

What Attorneys Should Provide

Neuroimaging (the actual MRI and CT studies, not just reports), emergency department and neurology records, all ophthalmic records with visual fields and OCT, laboratory results (including inflammatory markers in suspected giant cell arteritis), and prior records establishing baseline vision and alignment. Dr. Shomer provides record review, written reports, and deposition and trial testimony nationwide for both sides of the bar.

Frequently Asked Questions