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....
The Peristriate region of the occipital lobe is involved in visuospatial processing, discrimination of movement and color discrimination (Westmoreland et al., 1994). Damage to one side of the occipital lobe causes homonomous loss of vision with exactly the same field cut in both eyes.he occipital lobes are the center of our visual perception system. They are not particularly vulnerable to injury because of their location at the back of the brain, although any significant trauma to the brain could produce subtle changes to our visual-perceptual system, such as visual field defects and scotomas.