Amardeep Singh1, Torben L Sørensen. 1. Department of Ophthalmology, Copenhagen University Hospital, Roskilde, Denmark. asingh@dadlnet.dk
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 mm(2)) was not significantly different from the non-CBS group (median 16.2 mm(2)); however, the patients with CBS had significantly larger areas of geographic atrophy (median 2 mm(2)) compared to patients without CBS (median 0.3 mm(2)) (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.
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 mm(2)) was not significantly different from the non-CBS group (median 16.2 mm(2)); however, the patients with CBS had significantly larger areas of geographic atrophy (median 2 mm(2)) compared to patients without CBS (median 0.3 mm(2)) (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.