I had a dissection of the right carotid artery also with a small aneurysm at the same location as the tear went through the artery wall. There was a massive blood clot dangling in my neck and I went blind because a little piece of this huge blood clot broke off and went into my retina which cut off oxygen to the nerves in my retina, fortunately, because if it had gone further into my brain I likely would have been paralyzed or died. There is about one hour window to clear the blood clot in the eye before permanent damage to the oxygen starved nerves starts. That morning I had been suffering from ischemic strokes.

By being calm I decreased my blood pressure so small pieces of the blood clot in my neck stopped breaking off going into my brain and the whole huge blood clot didn't break off which would have been lethal.