A diagnostic sign in migraine?

Area of Science:

• Neurology
• Ophthalmology
• Clinical Diagnostics

Background:

• Migraine is a common neurological disorder.
• Patients with migraine sometimes report visual disturbances.
• The occurrence of after-images post-ocular fundoscopy in migraineurs was noted anecdotally.

Purpose of the Study:

• To investigate the association between after-images following ocular fundoscopy and the diagnosis of migraine.
• To determine the diagnostic utility of after-images for migraine.

Main Methods:

• A study was conducted on consecutive patients attending a general neurology outpatient clinic.
• Patients were assessed for the presence of after-images after ocular fundoscopy.
• Statistical analysis included calculating relative risk, sensitivity, specificity, and positive predictive value.

Main Results:

• Patients reporting an after-image had a relative risk of 2.91 for a migraine diagnosis.
• The sensitivity, specificity, and positive predictive value for migraine diagnosis were 0.63, 0.75, and 0.55, respectively.
• After-images were reported similarly by migraineurs with and without aura, and those with migraine equivalents.

Conclusions:

• The after-image phenomenon after ocular fundoscopy may serve as a supportive diagnostic indicator for migraine.
• This finding likely reflects an increased sensitivity to visual stimuli in individuals with migraine.
• While patient history remains primary, after-images can aid in migraine diagnosis.