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....
1 This tells the doctor whether or not a particular part of the peripheral field is normal, depressed, or absent.  Visual field map: the final basic report indicating the patient's visual field anywhere from the central 10 degrees all the way out to the farthest reaches of the field at 90 degrees.