Denne side blev automatisk oversat, og nøjagtigheden af oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

Charles Bonnet Syndrome in Low Vision Patients (CBS)

28. april 2026 opdateret af: Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Charles Bonnet Syndrome (CBS): Prevalence and Characteristics of Visual Hallucinations. Psychological Profile of the Visually Impaired Patient With CBS

Among patients with chronic and degenerative ocular diseases that cause visual limitations, the presence of Charles Bonnet Syndrome (CBS) may be detected as a comorbidity. CBS is as a phenomenon of complex visual hallucinations occurring in individuals with reduced visual function, in the absence of cognitive alterations, psychiatric and/or neurological conditions. It is estimated that 15.8% of patients with age-related macular degeneration and 13.5% among glaucoma patients have CBS. Prevalence rates vary widely, and this may depend on inconsistent diagnostic criteria, variability in the questions used to determine if an individual has visual hallucinations, and the reluctance of people to admit to having strange visions for fear of being considered mentally ill. Visual hallucinations can be invasive and debilitating, compromising mental health, quality of life, and rehabilitation in visually impaired individuals. Patients may experience confusion, anxiety, anger, paranoia, and social isolation. Regarding psychological aspects, about a third of patients report experiencing distress and fear,higher anxiety and social dysfunction particularly during the initial onset of symptoms and in the terminal stage of the disease.Screening questionnaires will be used.

Studieoversigt

Status

Tilmelding efter invitation

Betingelser

Charles Bonnets syndrom

Detaljeret beskrivelse

As part of our clinical practice, screening questionnaires will be used to assess the mental health and psychological profile of enrolled patients:

PHQ-9 (Patient Health Questionnaire): A 9-question tool for screening depression, with scores ranging from 0-27 to assess depression severity. Scores above 5 require referral to a clinical psychologist; scores 15+ suggest psychiatric evaluation.

GAD-7 (General Anxiety Disorder): A 7-item tool to screen for generalized anxiety disorder, with scores from 0-21. Scores 10+ require clinical psychologist referral, and 15+ indicate the need for psychiatric evaluation.

SCL-90R (Symptom Checklist-90): A 90-item questionnaire assessing a range of psychological symptoms, including depression, anxiety, and aggression, rated on a Likert scale from 0 to 4.

NEI VFQ25 (National Eye Institute Visual Function Questionnaire): A tool to assess the quality of life related to vision.

GSES (Generalized Self-Efficacy Scale):A 10-item scale to measure perceived self-efficacy and coping mechanisms for stressful life events, rated on a 4-point Likert scale.

PSS (Perceived Stress Scale):A tool to measure how individuals perceive their life as stressful, focusing on unpredictability, uncontrollability, and overwhelm.

GHQ-12 (General Health Questionnaire-12):A 12-item questionnaire to identify general mental health problems, focusing on the past two weeks.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

640

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

Italien
- - Roma, Italien, 00168
    - fondazione Policlinico Universitario A. Gemelli IRCCS, Polo Nazionale Ipovisione

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

Voksen
Ældre voksen

Tager imod sunde frivillige

N/A

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

Visually impaired individuals with central and peripheral defects who access the center for visual rehabilitation.

Beskrivelse

Inclusion Criteria:

Best corrected visual acuity between 1/20 (1.0 LogMAR) and 3.2/10 (0.5 LogMAR) in cases of central vision impairment.
Residual binocular visual field ≤ 60% in cases of peripheral vision impairment.
Patients with age-related macular degeneration, Stargardt's disease, or glaucoma.
Age between 40 and 70 years.
Signed informed consent.

Exclusion Criteria:

Age under 40 years.
Clear cognitive impairments that reduce patient reliability.
Psychiatric disorders.
Refusal to sign informed consent to participate in the study.
Mental State Examination (MMSE) score below 22.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål	Foranstaltningsbeskrivelse	Tidsramme
Prevalence of the Charles Bonnet Syndrome Tidsramme: From baseline through study completion, up to 24 months.	Prevalence of Charles Bonnet Syndrome, calculated as the ratio between the number of visually impaired patients affected by CBS and the total number of patients attending the visual rehabilitation center, multiplied by 100 (%).	From baseline through study completion, up to 24 months.

Sekundære resultatmål

Resultatmål	Foranstaltningsbeskrivelse	Tidsramme
Change in Generalized Anxiety Disorder-7 (GAD-7). 7 items score. Tidsramme: 3 hours	Scale range: 0 to 21 Interpretation: higher scores indicate a worse outcome (greater severity of anxiety symptoms) Cut-off: greater than 5	3 hours
Change in Patient Health Questionnaire-9 (PHQ-9). 9 Items score Tidsramme: 3 hours	Scale range: 0 to 27 Interpretation: higher scores indicate a worse outcome (greater severity of depressive symptoms) Cut-off: greater than 5	3 hours
Change in Symptom Checklist-90 (SCL-90) . 90 items score Tidsramme: 3 hours	Scale range: 0 to 4 (mean score across items) Interpretation: higher scores indicate a worse outcome (greater psychological distress) Cut-off: greater than 1.5	3 hours
Change in Eye Institute Visual Function Questionnaire-25 (NEI VFQ-25). 25 items score Tidsramme: 3 hours	Scale range: 0 to 100 Interpretation: higher scores indicate a better outcome (better visual function and quality of life) Cut-off: less than 60	3 hours
Change in General Self-Efficacy Scale (GSES) score. Tidsramme: 3 hours	Scale range: 10 to 40 Interpretation: higher scores indicate a better outcome (greater perceived self-efficacy) Cut-off: less than 30	3 hours
Change in Perceived Stress Scale (PSS) score. Tidsramme: 3 hours	Scale range: 0 to 40 Interpretation: higher scores indicate a worse outcome (greater perceived stress) Cut-off: less than 15	3 hours

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Efterforskere

Ledende efterforsker: Stefania Fortini, MD, Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

15. januar 2025

Primær færdiggørelse (Anslået)

31. august 2026

Studieafslutning (Anslået)

31. januar 2027

Datoer for studieregistrering

Først indsendt

20. december 2024

Først indsendt, der opfyldte QC-kriterier

28. april 2026

Først opslået (Faktiske)

1. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)