Charles Bonnet syndrome

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Bon·net syndrome

complex visual hallucinations without attendant psychological abnormality; more common in old people with vision problems.

Charles Bonnet syndrome

An idiopathic condition characterised by complex hallucinations in otherwise normal people who have various forms of visual impairment—e.g., glaucoma, methanol poisoning, cataracts. It has been attributed to the loss of suppression of spontaneous images resulting from the lack of visual input. It was described in 1769 by the Swiss philosopher, Charles Bonnet (1720–1793).

Charles Bonnet syndrome

(sharl bo-na')
[Charles Bonnet, Swiss scientist, 1720–1793]
Complex visual hallucinations typically experienced by elderly people with profound visual impairment, such as the loss of central visual acuity in macular degeneration. Synonym: release hallucination; Synonym: visual release hallucination


Charles, Swiss naturalist, 1720-1795.
Charles Bonnet syndrome - geriatric disorder marked by hallucinations.
References in periodicals archive ?
Oliver Sacks, followed by an interview with 93-year-old retired educator Marge Louer, who tells her personal story of coping with Charles Bonnet Syndrome.
She said: "He told me about Charles Bonnet Syndrome.
1) The eponym Charles Bonnet syndrome (CBS) was originally used by eminent Swiss neurologist Georges de Morsier in 1936 to describe the presence of visual hallucinations (VH) in elderly individuals with normal mental capacity as separate from those associated with neurodegenerative disease.
To be able to give appropriate advice to patients with Charles Bonnet syndrome (Group 1.
Charles Bonnet syndrome (CBS) is characterized by complex visual hallucinations in psychologically normal people with low vision (Shiraishi, Terao, Ibi, Nakamura, & Tawara, 2004) The disorder typically occurs in older adults and in a wide spectrum of ophthalmic diseases, with macular degeneration being the most common.
An examination of the relationship between low vision and Charles Bonnet syndrome.
Oliver Sacks, and 93 year old Marge Louer, who tells her personal story of coping with Charles Bonnet Syndrome.
Abstract: Charles Bonnet syndrome (CBS) commonly occurs in older adults with visual impairments, particularly those with age-related macular degeneration.
One example is Charles Bonnet syndrome (CBS), in which visually impaired patients can experience vivid visual hallucinations.
These recommendations were on visual acuity, the delivery of bad news, the referral for visual rehabilitation services, and the Charles Bonnet syndrome (see Box 1).
A key point is that most people who were blindfolded for long enough would develop Charles Bonnet Syndrome.