Aura (symptom)
There are different kinds of migraines. About 15% of people who have a migraine will have an aura. The symptoms may include visual problems like not being able to see for a short time, seeing zig-zag lines or floating spots, dizziness, a ringing noise in the ears (tinnitus), and problems speaking.  It may take up to an hour after the aura begins before a person starts getting a migraine.