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[Charles Bonnet's syndrome].

M Gonzalez-Delgado¹, A Tunon, J Salas-Puig

¹Servicios de Neurología, Hospital Central de Asturias, Oviedo, Spain. mgonzalezde@seneurologia.com

Neurologia (Barcelona, Spain)

|February 27, 2004

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Charles Bonnet's syndrome causes visual hallucinations in individuals with severe vision loss, often elderly. Differentiating it from psychiatric conditions is crucial, with deafferentation potentially explaining the visual phenomena.

Area of Science:

Ophthalmology
Neurology
Psychiatry

Background:

Charles Bonnet's syndrome involves visual hallucinations without psychiatric or cognitive impairment.
It predominantly affects elderly individuals with significant visual impairments.

Observation:

Case 1: 87-year-old woman with bilateral cataracts experiencing visual hallucinations of women and faces.
Case 2: 87-year-old woman with advanced myopia reporting visions of people, animals, and objects.
Case 3: 52-year-old woman with atypical pigmentary retinopathy seeing colored objects and animals.

Findings:

Neuroimaging and neurophysiological studies were inconclusive.
Pharmacological treatments (neuroleptics, antiepileptics) showed limited efficacy, successful in only one case.

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Implications:

Highlights the importance of recognizing Charles Bonnet's syndrome and distinguishing it from psychiatric disorders.
Suggests deafferentation of the visual cortex as a potential underlying mechanism for these visual hallucinations.