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....
If any of the visual disturbances begins suddenly and unexpectedly, see a doctor as soon as possible. In some cases, the visual disturbance may be the result of a minor problem, but many serious conditions, such as aneurysm, glaucoma, and brain tumors first cause vision problems. Your doctor will likely perform several diagnostic tests to determine the cause of your visual disturbance.