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.
Common Causes of Eye Twitching. 1  Stress. 2  Lack of sleep (Plus Stress Can Increase It) 3  Fatigue. Corneal irritation or injury.  Prolonged staring or eye 1  strain. Excessive Caffeine. 2  Alcohol. Electrolyte imbalance.  Neurological 1  disorders. Possibly Hereditary.