The rarity of Charles Bonnet syndrome

Shiraishi, Yumiko; Terao, Takeshi; Ibi, Kenji; Nakamura, Jun; Tawara, Akihiko

doi:10.1016/s0022-3956(03)00090-6

Cited by 42 publications

(33 citation statements)

References 20 publications

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“…Although best described in age-related macular degeneration (AMD), this phenomenon may occur in any condition causing vision loss (Shiraishi et al 2004;Tan et al 2004). The symptoms of CBS vary from seeing geometric figures to experiences of seeing people or animals.…”

Section: Introductionmentioning

confidence: 99%

The prevalence and clinical characteristics of Charles Bonnet Syndrome in Danish patients with neovascular age‐related macular degeneration

Singh

Sørensen

2010

Acta Ophthalmologica

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Abstract.Purpose: To investigate the prevalence and clinical characteristics of the Charles Bonnet Syndrome (CBS) in a group of Danish patients with neovascular age‐related macular degeneration (AMD) and to study whether CBS is associated with a specific retinal morphology.Methods: Three‐hundred consecutive patients with neovascular AMD attending assessment consultations following variable series of ranibizumab therapy were actively asked whether they had symptoms of CBS. If they responded positively, a detailed questionnaire was orally administered to inquire into the details of the symptoms. Detailed optical coherence tomography and autofluorescence was performed. A comparison was made between retinal morphology of a randomly selected equal number of patients without CBS to patients with CBS.Results: Twenty‐five (8.3%) patients of 300 had hallucinations attributable to CBS. The median lesion size – measured as total area with increased autofluorescence – in the CBS group (median 14.2 mm2) was not significantly different from the non‐CBS group (median 16.2 mm2); however, the patients with CBS had significantly larger areas of geographic atrophy (median 2 mm2) compared to patients without CBS (median 0.3 mm2) (p = 0.002).Conclusion: CBS is not uncommon in an unselected population with neovascular AMD, and symptoms of CBS may be associated with larger areas of geographic atrophy.

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Section: Introductionmentioning

confidence: 99%

The prevalence and clinical characteristics of Charles Bonnet Syndrome in Danish patients with neovascular age‐related macular degeneration

Singh

Sørensen

2010

Acta Ophthalmologica

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“…Its prevalence in this population ranges from 0.5% to 19.5%. 1,2 Two categories of hallucination (VH) 3 have been described: simple and complex. Simple hallucinations (SH) include such images as spots, flashes, floaters and shapes (e.g., circles, squares), whereas complex hallucinations (CH) include people, faces, animals, plants or whole scenes.…”

Section: Introductionmentioning

confidence: 99%

Visual Hallucinations in Patients with Age-Related Macular Degeneration (AMD)

Lennon¹,

White

Logan

et al. 2006

Visual Impairment Research

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Background: Charles Bonnet Syndrome is defined as visual hallucinations in psychologically normal people and has been associated with low vision for over two hundred years. Objectives: To evaluate the prevalence and complexity of visual hallucinations in patients with low vision. Design: A crosssectional comparative analysis of clinical visual data and hallucinatory phenomena in two groups of patients with age-related macular degeneration and a third control group. Methods: A questionnaire on visual hallucinations was administered to 145 patients and 58 control individuals. Measurements: Visual hallucination type (simple, complex) was examined and group comparisons were made using analysis of variance, cross-tabulations, and percentages. Results: Those individuals reporting visual hallucinations had a significantly lower mean visual acuity than comparative groups. Materialization and frequency of visual hallucinations were dependent on hallucination type. Hallucination type was not dependent on visual acuity. While visual hallucinations were reported by 40% of patients, Charles Bonnet Syndrome as defined in this study, was prevalent in 21% of the low vision cases. Conclusion: Charles Bonnet Syndrome occurs in approximately 1/5 of patients with age-related macular degeneration. Visual hallucinations are dependent on visual acuity rather than on age or ocular condition. Greater awareness of this condition among the medical and allied professions is important so that patients can be advised and reassured accordingly. Consideration should be given to including Charles Bonnet Syndrome as a discrete Syndrome in major classification systems.

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“…[3] In 1936, de Morsier, a neurologist, coined the eponym CBS in recognition of Bonnet,[6] and described it as visual hallucinations that occur in older people with otherwise intact mental functioning, but unlike Charles Bonnet, he did not emphasize that visual impairment is a possible cause of the visual hallucinations. [7891011]…”

Section: Discussionmentioning

confidence: 99%

Multimodal Hallucinations in a Visually Impaired Elderly Female: Is it a Variant of Charles Bonnet Syndrome?

Sarkar¹,

Subramanium²,

Jha

2017

Indian Journal of Psychological Medicine

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Charles Bonnet Syndrome (CBS) is a common cause of visual hallucinations seen in elderly people with visual impairment. Well-formed visual hallucinations in clear consciousness with preserved insight are commonly reported in literature. We report a case of CBS having multisensory hallucinations. An elderly patient with visual impairment fulfilling the criteria of CBS presents with various modalities of hallucinations viz. visual, auditory and tactile hallucinations improved completely with low dose of antipsychotics. Atypical features are common in CBS and thus often make it difficult to diagnose this condition.

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The rarity of Charles Bonnet syndrome

Cited by 42 publications

References 20 publications

The prevalence and clinical characteristics of Charles Bonnet Syndrome in Danish patients with neovascular age‐related macular degeneration

The prevalence and clinical characteristics of Charles Bonnet Syndrome in Danish patients with neovascular age‐related macular degeneration

Visual Hallucinations in Patients with Age-Related Macular Degeneration (AMD)

Multimodal Hallucinations in a Visually Impaired Elderly Female: Is it a Variant of Charles Bonnet Syndrome?

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