Effects of migraine on visual function.
BACKGROUND
Data is reported from an ongoing trial considering whether visual loss associated with migraine is consistent with a selective deficit in M- or P-cell functioning.


METHODS
The psychophysical tests used include spatio-temporal contrast thresholds and luminance increment thresholds for a spot drifting across a spatially or temporally modulated background. A migraineur and 15 non-headache controls participated in the present study. Measurements were made foveally and at 10 degrees in the superior field. Static and flicker perimetry were conducted.


CONCLUSIONS
Regionalized losses occurred for stimuli with moderate temporal frequencies (16 Hz), which is consistent with M-cell dysfunction.
McKendrick
A M
AM
Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Victoria, Australia.
Badcock
D R
DR
Heywood
J
J
Vingrys
A J
AJ
D000328:Adult; D015350:Contrast Sensitivity; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000503:physiopathology*; D014786:Vision Disorders / Q000503:physiopathology*; D058609:Visual Field Tests; D014794:Visual Fields; D014796:Visual Perception / Q000502:physiology*