Charles Bonnet, eye close up

Charles Bonnet Syndrome

What is Charles Bonnet Syndrome?

In Charles Bonnet Syndrome, some people with poor vision may experience silent visual hallucinations. These may be quite vivid. They are caused by the brain trying to ‘fill in’ detail in the blind areas.

These visual hallucinations can sometimes be quite frightening and confusing for the sufferer. The patient may be particularly worried that they are signs of mental illness or dementia, and it is for this reason that many sufferers feel they cannot discuss their symptoms with family and friends.

The symptoms do not last forever and do decrease over time, but it may take up to five years for them to completely disappear.

More information

If you are worried about having this condition, you should talk to your optometrist, ophthalmologist or GP. You can also find out more information on the following websites: