I am getting grid like , geometrical patterns , and shapes in my feild of vision but only as I awaken in morning. I have a history of visual migraines. But these seem different. I went to my eye specialist who said it could be due to low blood pressre while Im sleeping my blood pressur is lower. ? can low blood pressure actually cause a migraine aura. I am also getting ringing in ears. Is this a migraine aura or something else. I have really bad anxiety about my health..can anyone relate>? any responses would be appreciated