Charles Bonnet syndrome (CBS) is a common occurrence of visual hallucinations in the elderly with visual impairment. It is generally benign and is managed supportively and non-pharmacologically with interventions to restore vision. In its atypical form, it also has hallucinations in other modalities. We report here a case of atypical CBS in a 56-year-old man with bilateral vision loss due to an old injury in one eye and the mature cataract in another eye. The patient responded well to olanzapine.
Schadlu AP, Schadlu R, Shepherd JB. Charles Bonnet syndrome: a review. Curr Opin Ophthalmol 2009;20(3):219–222. DOI: 10.1097/ICU.0b013e328329b643.
Pang L. Hallucinations experienced by visually impaired: Charles Bonnet syndrome. Optometry Vision Sci 2016;93(12):1466–1478. DOI: 10.1097/OPX.0000000000000959.
Arun P, Jain R, Tripathi V. Atypical Charles Bonnet syndrome. Indian J Psychol Med 2013;35(4):402–404. DOI: 10.4103/0253-7176.122240.
Gilmour G, Ewing C. An examination of the relationship between low vision and Charles Bonnet syndrome. Can J Ophthalmol 2009;44(1):49–52. DOI: 10.3129/i08-169.
Hughes DF. Charles Bonnet syndrome: a literature review into diagnostic criteria, treatment and implications for nursing practice. J Psychiatr Ment Health Nurs 2013;20(2):169–175. DOI: 10.1111/j. 1365-2850.2012.01904.x.
Jackson ML, Ferencz J. Charles Bonnet syndrome: visual loss and hallucinations. Can Med Assoc J (CMAJ) 2009;181(3–4):175–176. DOI: 10.1503/cmaj.090049.
Jan T, del Castillo J. Visual hallucinations: Charles Bonnet syndrome. West J Emerg Med 2012;13(6):544–547. DOI: 10.5811/westjem.2012.7.12891.
Walker JD, Keys MA. Dementia with Lewy bodies and Charles Bonnet syndrome. Retinal Cases Brief Rep 2008;2(1):27–30. DOI: 10.1097/01.iae.0000243039.22011.5f.
Buyukgol H, Ilik F, Ertem DH. Evaluation of the clinical features, management, and prognoses of patients with Charles Bonnet syndrome. J Nerv Ment Dis 2019;207(12):1045–1047. DOI: 10.1097/NMD.0000000000001101.
O'Farrell L, Lewis S, McKenzie A, et al. Charles Bonnet syndrome: a review of the literature. J Visual Impair Blindness 2010;104(5):261–274. DOI: 10.1177/0145482X1010400502.
Casey P, Kelly B. Fish's clinical psychopathology: signs and symptoms in psychiatry. Cambridge University Press; 2019. p. 43.
Hori H, Terao T, Nakamura J. Charles Bonnet syndrome with auditory hallucinations: a diagnostic dilemma. Psychopathology 2001;34(3):164–166. DOI: 10.1159/000049301.