Virtual Reality-based Perceptual Learning Therapy for Visually Impaired Population
Virtual Reality-based Perceptual Learning Therapy for Visually Impaired Population: Study Protocol for a Randomized Clinical Trial
Aperçu de l'étude
Statut
Statut
Les conditions
Les conditions
Intervention / Traitement
Intervention / Traitement
Type d'étude
Type d'étude
Inscription (Estimé)
Inscription
Phase
Phase
- N'est pas applicable
Contacts et emplacements
Coordonnées de l'étude
Coordonnées de l'étude
- Nom: Ke Zhang
- Numéro de téléphone: 852+53748502
- E-mail: ke.zhang@cevr.hk
Lieux d'étude
-
-
-
Hong Kong, Hong Kong
- Units 901-903, 9/F, Building 17W, 17 Science Park West Avenue, Hong Kong Science Park, Pak Shek Kok, Shatin
-
Contact:
- Ke Zhang
- Numéro de téléphone: 852+53748502
- E-mail: ke.zhang@cevr.hk
-
-
Critères de participation
Critère d'éligibilité
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
La description
Inclusion Criteria:
- Humphrey visual field analyzer (HFA) visual field loss (mean deviation of ≤-6 dB)
Exclusion Criteria:
- Comprehension disorder that does not allow understanding of tests or training (e.g., in severe aphasia)
- Currently under other PL treatment
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Double
Nombre de bras
Armes et Interventions
Groupe de participants / BrasGroupe de participants / Bras |
Intervention / TraitementIntervention / Traitement |
|---|---|
|
Expérimental: Virtual Reality-based Perceptual Learning Training
|
Prior to the training session, participants' visual fields will be assessed using standard automated perimetry (e.g., Humphrey Field Analyzer, 30-2 or 24-2 grid). Based on the decibel (dB) sensitivity maps from the clinical results, each participant's visual field will be classified into three functional zones: the intact zone (normal sensitivity), the absolute blind zone (<0 dB), and the transition zone or "gray area" (1~20 dB; relative scotoma characterized by reduced but present sensitivity). One training session will be 20 ~30 minutes for each task. Participants will be asked to complete a total of 6 training sessions. In each training session, the participant will be asked to complete two tasks (i.e., ecological multiple object tracking task and dual task) which will take approximately one hour. Training sessions will be spaced at intervals of 1~7 days. |
|
Aucune intervention: No-intervention Control
|
Que mesure l'étude ?
Principaux critères de jugement
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Visual Area Improvement
Délai: Within one week after the training ends
|
Primary outcome is the visual area measured using the HVF (24-2, SITA-standard), where sensitivity increased by 6 dB or more relative to baseline in the defective hemifield or whole field.
|
Within one week after the training ends
|
Mesures de résultats secondaires
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Pre/post-intervention assessments of visual search
Délai: Within one week after the training ends
|
Visual search: Perceptual processing efficiency will be assessed using a visual search task - spatial configuration search task (Wolfe et al., 2010).
In this task, participants were instructed to fixate on the centre of the screen and to locate a target.
Each trial began with a short tone, followed after 500 ms by a search display.
Participants pressed a key to report whether the target was present (in 50% of trials) or absent, responding as quickly and accurately as possible.
Feedback-indicating response correctness-appeared for 500 ms after each trial.
Trials were separated by a 1000-ms inter-trial interval.
Set size was systematically varied across two conditions-6 items (1 target + 5 distractors) and 18 items (1 target + 17 distractors)-to quantify search efficiency.
For each participant, reaction time (RT) was regressed on set size, and the resulting slope served as the primary index of perceptual processing efficiency: shallower slopes indicate higher efficiency.
|
Within one week after the training ends
|
|
Pre/post-intervention assessments of balance ability
Délai: Within one week after the training ends
|
Balance: The Bertec Balance Advantage™ system is used to assess participants' balance before and after training.
During the test, participants are asked to stand under different challenging conditions.
Balance-challenging conditions include (1) standing on a firm or foam surface (Fi/Fo); (2) standing surface with backward or forward translation (BT/FT); and (3) standing with their eyes close (EC).
Outcome measures, including root mean square sway of the center of pressure in the anterior - posterior and medial -lateral directions (mm/s), total sway path length (mm), and maximum CoP displacement in the AP and ML directions (mm)
|
Within one week after the training ends
|
|
Pre/post-intervention assessments of fear of fall
Délai: Within one week after the training ends
|
Fear of fall: The English & Chinese version of the Falls Efficacy Scale-International (FES-I) is a validated and reliable questionnaire used to assess fear of falling in everyday life.
The FES-I total score ranges from 16 to 64.
Higher scores indicate greater concern about falling and therefore a worse outcome.
|
Within one week after the training ends
|
|
Pre/post-intervention assessments of quality of life (a)
Délai: Within one week after the training ends
|
The National Eye Institute 25-Item Visual Function Questionnaire (NEI-VFQ-25), English and Chinese versions.
The NEI VFQ-25 scores range from 0 to 100.
Higher scores indicate better visual functioning and better vision-related quality of life and therefore represent a better outcome.
|
Within one week after the training ends
|
|
Pre/post-intervention assessments of quality of life (b)
Délai: Within one week after the training ends
|
The Chinese version of the Low Vision Quality of Life Questionnaire (CLVQOL) is used to assess vision-related quality of life.
The CLVQOL contains 25 items, each scored from 0 to 5, resulting in a theoretical total score ranging from 0 to 125.
Higher scores indicate fewer vision-related difficulties and better vision-related quality of life and therefore represent a better outcome.
|
Within one week after the training ends
|
Collaborateurs et enquêteurs
Parrainer
Parrainer
Collaborateurs
Collaborateurs
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Début de l'étude
Achèvement primaire (Estimé)
Achèvement primaire
Achèvement de l'étude (Estimé)
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Première publication
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour publiée
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Dernière vérification
Plus d'information
Termes liés à cette étude
Autres numéros d'identification d'étude
Autres numéros d'identification d'étude
- CEVR-PL-20260831
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Délai de partage IPD
Critères d'accès au partage IPD
Type d'informations de prise en charge du partage d'IPD
- PROTOCOLE D'ÉTUDE
- SÈVE
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Étudie un produit d'appareil réglementé par la FDA américaine
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .