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.
In this article. Font Size. A. A. A. Ocular migraines cause vision loss or blindness lasting less than an hour, along with or following a migraine headache. Experts sometimes call these episodes retinal,  ophthalmic , or monocular (meaning one eye) migraines.This problem is rare.ision loss can be a complication of retinal migraines. Headache that lasts from four to 72 hours. The headache tends to: 1  Affect one side of your head. 2  Feel moderately or very painful. 3  Pulsate in intensity.