Classic Migraine usually refers to the presense of an Aura, in your case visual effects. These aura may signal a migraine about to occur. I had visual migraines for 15 years, I would get what is known as a scintillating scotoma (a colorful blindspot), which lasted 45 minutes, sometimes lasting for 90 minutes. I never had any pain,so in that sense I was fortunate. But I would get them sometimes a few times a week. Nerve rattling. The following is what I saw.
A word on Acetaminophen and Ibuprofen. Although these are over-the-counter medications, they are not harmless, and indiscriminate use can and will damage the liver and may have other consequences. Please discuss with your doctor or pharmacist your use of these two drugs, any other drugs you are taking, including vitamins, supplements, and energy drinks. If the pain is too much for one or the other of these medications, a prescription medication that is more effective may be advisable.
Approximately 20% of Migraine attacks do have an Aura.
An Aura involves symptoms that precede an impending attack of head pain including- visual symptoms (blurred vision, blind spots etc) and sensory changes such as pins and needles in the face or hands and arms (amongst the most common symptoms).
Classic Migraine typically involve an Aura followed by the head pain itself. Aura is believed to be due to a constriction of the blood vessels leading to the head and brain with a corresponding decrease in the blood flow to the head and brain. The head pain itself is believed to be due to the vasodilatation that follows and possibly the release of pain chemicals which are released during an attack, sensitizing the nerves in the region. Aura aside, the pain of a classic migraine is usually similar to that of a common migraine and the main distinction is the presence or absence of an Aura."