How do strokes and brain trauma affect vision?
The human visual system is a complex relationship of sensory-motor functions that are controlled and organized in the brain. People who have suffered a stroke or a brain injury often experience problems with vision afterwards. This is called Post Trauma Vision Syndrome. It is the result of either eye misalignment, or damaged or partially damaged brain cells where the brain processes vision. Many stroke or brain injury patients suffer from double vision, causing confusion and disorientation, and sometimes difficulty in reading. Just as common is losing half of one’s field of vision. Either the right or left side can be lost. The affected individual has a built-in blind spot, unable to see anything to the left or right, depending on where the loss occurs. A similar effect can happen when damage occurs in the parietal lobe, the part of the brain that controls sensory perception. Such people are not only unable to see objects or people on the left side of their field of vision, but they ma
