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....
Definition. Hemianopsia is the loss of half of the visual field. A person with hemianopsia only sees a portion of the visual field from each eye. Hemianopsia is classified by where the missing visual field is located: Outer half of each visual field (bitemporal) The same half of each visual field (homonymous) Right half of each visual field (right homonymous) Left half of each visual field (left homonymous) Upper half of each visual field (superior) Lower half of each visual field (inferior)