EFFECTS OF MIGRAINE ON VISUAL FUNCTION

Background: Data is reported from an ongoing trial considering whether visual loss associated with mig raine is consistent with a selective deficit in M- or P-cell functioning. Methods: The psychophysical tests used include spatiotemporal contrast thresholds and luminance increme nt thresholds for a spot drifting across a spatially or temporally mod ulated background. A migraineur and 15 non-headache controls participa ted in the present study. Measurements were made foveally and at 10 de grees in the superior field. Static and flicker perimetry were conduct ed. Result/Conclusion: Regionalized losses occurred for stimuli with m oderate temporal frequencies (16 Hz), which is consistent with M-cell dysfunction.