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2. Causes

Even though it is understood that vision loss triggers the hallucinations, the underlying reason behind Charles Bonnet syndrome is not thoroughly understood. One theory is that the loss of actual visual information from the eyes allows the brain to ‘play’ with images in its stored picture library.

CBS occurs most often among the elderly who are more likely than any other age group to have eye conditions that affect sight, such as age-related macular degeneration.

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