Heart or blood vessel problems that can cause chest pain: 1  Angina or a heart attack. 2  A tear in the wall of the aorta, the large blood vessel that takes blood from the heart to the rest of the body (aortic dissection) causes sudden, severe pain in the chest and upper back.
Hemianopsia is a loss of vision in half of the visual field of one eye or both eyes. Common causes are stroke, brain tumor, and trauma to the brain. Normally, the left half of the brain receives vision from the right eye, and vice versa....
Migraine is probably the most common organic cause of transient visual loss in children. Migraine with aura is a common cause of transient visual disturbance at any age. In a study of 83 patients younger than 45 years with episodic visual loss, migraine was the most likely cause in the majority of cases.