Can visual hallucination be caused by macular degeneration?
Charles Bonnet Syndrome results in hallucinations and occurs in patients who have eye diseases that prevent the normal nerve impulses from reaching the brain. As the brain tries to interpret the signals it may generate spontaneous nerve activity which causes hallucinations. Charles Bonnet syndrome is estimated to occur in 12% of macular degeneration patients and appears more often in women than men. It is also more likely to occur if both eyes are affected by MD. The hallucinations are complex and fully formed images. They are most frequently of animals, people, faces, or scenery. Some people also see writing. The hallucinations may last for seconds or for most of the day. They tend to disappear when people close their eyes. The syndrome may be experienced for a period ranging from days to years, although it usually disappears after a few months. People with Charles Bonnet Syndrome may need reassurance that that they are not “going insane” or suffering from a psychotic disorder.
