Additionally, a migraine is characterized by a moving, scintillating scotoma, not a fixed, bilateral, homonymous field cut.
[emedicine.medscape.com]
[…] studies also noted the predominance of visual symptoms and signs.1,2,7,10,11,15,20 The visual field defect frequently was a hemianopia or quadrantanopia, or, less frequently, scotomas
[jamanetwork.com]