Visual Perceptual Learning for the Treatment of Visual Field Defect (VIVID)

Asan Medical Center

Status: Completed

Conditions: Stroke; Visual Field Defect

Treatments: Behavioral: Visual perceptual learning

Study type: Interventional

Funder types: Other

Identifiers

NCT01959256

VIVID

Details and patient eligibility

About

This study will test the hypothesis whether visual field defect caused by chronic stroke could be improved by visual perceptual learning. The secondary hypothesis is that improvement of visual field defect would be accompanied by connectivity changes in visual networks. In addition, investigators will evaluate whether improvement of visual field defect could achieve improvement of subjective visual function.

Full description

Study design: A PROBE (Prospective, Randomized, Open-label, Blinded-endpoint) design

Methods:

1. Visual perceptual learning (VPL) group

   1. Visual perceptual learning (24 times for 2 months, 3 times per week) in visual field defect areas
   2. At baseline and post-VPL evaluations (2 months after): Structural & Functional MRIs, Visual field tests, Visual evoked potential, Visual cognitive tests, Subjective visual function questionnaires

2. Control group

   1. At baseline and 2-months later: No VPL, Structural & Functional MRIs, Visual field tests, Visual evoked potential, Visual cognitive tests, Subjective visual function questionnaires
   2. Visual perceptual learning after 2-month follow-up evaluation (24 times for 2 months, 3 times per week)

   (The patients who were stratified by age (over 65 years old or not) and degree of visual field defect (quadrantanopia or complete hemianopia) will be randomly assigned into the learning and control group.)

3. Investigations

   1. Improvement of visual field test scores between VPL group and control group
   2. Analysis of brain network changes in MRI data
   3. Correlation analysis of improvement of visual field defect and MRI data
   4. Correlation analysis of improvement of visual field defect and visual evoked potential (VEP) data
   5. Correlation analysis of improvement of visual field defect and neuropsychological data

Enrollment: 36 patients

Sex: All

Ages: 20 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. The patient has chronic stroke more than 6 months after onset.
2. The patient has visual field defect (Quadrantanopia or Hemianopia).
3. The patient has corrected eyesight 0.7 or above.

Exclusion criteria

1. The patient has contraindication to MRI scan.
2. The patient has cognitive impairment (Mini-Mental Status Exam score <24).
3. The patient has ophthalmologic diseases (e.g., glaucoma, cataract).

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

---

36 participants in 2 patient groups

Learning

Experimental group

Description:

Visual perceptual learning (VPL) group

Treatment:

Behavioral: Visual perceptual learning

Control

No Intervention group

Description:

Control group