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....
Visual field deficits The highway of visual information (retina-LGN-V1) can be vulnerable to strokes and tumors. Because of the orderly organization of this central visual pathway, such lesions produce characteristic gaps in the visual field. A lesion of the right optic nerve causes a total loss of vision in the right eye; it also produces a right afferent pupil deficit.