NCT03148249

A Trial of Patients With a Charles Bonnet Syndrome

A Randomized Control Trial of Patients With a Charles Bonnet Syndrome

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 34 (actual)
• Sponsor: Vienna Institute for Research in Ocular Surgery · Academic / Other
• Sex: All
• Age: 55 Years – 105 Years
• Healthy volunteers: Not accepted

Summary

Charles Bonnet Syndrome (CBS) is defined by the occurence of visual hallucinations (VH) in the absence of any mental disorder. Elderly patients with reduced visual acuity due to ophthalmic diseases are most affected. Conditions are often associated with the syndrome of age-related macular degeneration, cataract or glaucoma. Existing data on the syndrome's prevalence in Europe reveal diverse results. Aim of this study was to assess the prevalence of CBS in patients with low visual acuity and to evaluate, if an additional therapeutic interview with and treatment by a psychiatrist is beneficial.

Detailed description

Patients with a visual acuity of 0.5 LogMAR or less in the better eye were screened for CBS. Instruments used were an interview asking for details of the hallucinations, a mental test and a scale concerning quality of life. Patients with CBS were randomized by minimization in two groups: in group 1, a patient-doctor interview by an ophthalmologist was performed and in group 2 an interview and if needed, a therapy by a psychiatrist. At the 3-months follow up, the psychological strain of patients was recorded again.

Conditions

• Prevalence, Psychiatrist Intervention

Interventions

Type	Name	Description
OTHER	interview	control group: interview, study group: explanation and exploration

Timeline

• Start date: 2014-10-10
• Primary completion: 2016-02-17
• Completion: 2017-02-01
• First posted: 2017-05-10
• Last updated: 2017-06-27