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.
They are also called retinal migraine, eye migraine or ophthalmic migraines. Ocular migraines are caused by a sudden tightening (or constriction) of blood vessels, which reduces blood flow to the eye. Most last under five minutes.Afterwards, vision usually returns to normal.ermanent vision loss is quite rare. Ocular migraines may be more common in. 1  Women. 2  People under 40 years old. 3  People who have a personal or family history of migraines or other headaches. 4  People who have diseases such as lupus, hardening of the arteries, sickle cell disease, epilepsy or depression.