Charles Bonnet Syndrome

What is Charles Bonnet Syndrome?

(pronounced bo NAY) is a condition that causes people with decreased vision and various eye diseases to have visual hallucinations. 


The exact cause of visual hallucinations is not known. Most researchers believe they are due to deafferentation: a loss of signals from the eye to the brain. 


Hallucinations occur when the affected person is awake, and are usually purely visual and not associated with auditory (sound) hallucinations. A person with CBS is generally aware that images are not real, though he or she may initially be confused by them.