With SVG we can add a clipping path to change the shape of our images. First we open a SVG tag with namespaced href attribute and namespace definition: <svg class=svg-graphic width=180 height=200 viewBox=0 0 560 645 xmlns=http://www.w3.org/2000/svg xlink=http://www.w3.org/1999/xlink version=1.1>.
Just as with other types of migraine, the underlying cause for migraines with visual symptoms have not been definitively established. Many researchers believe that these symptoms are caused by a short-lived reduction in blood flow, which might be caused by a spasm in the blood vessels.
Migraine Triggers and Causes Overview. Migraine triggers are factors that contribute to migraine attacks. Migraine causes are the underlying reasons in the body, especially in the brain, that may chemically lead to migraines. Different migraine sufferers have different migraine triggers, which are also called precipitating factors. The same triggers may not spark a migraine each time.