- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01691027
Visuomotor Rehabilitation Training for Manual Task Deficits From Macular Scotomas (VRT)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The research objective is to test the hypothesis that practicing eye-hand coordination using tablet-computers can improve manual skills of those with Age-related Macular Degeneration (AMD). AMD causes the loss of sharp central vision used for reading and many other everyday activities. Those with AMD experience a "macular scotoma", a blanked-out area of whatever they're attempting to look at, and they must use an area of peripheral vision, the "Preferred Retinal Locus (PRL)" to look at objects of interest. The PRL does not provide sharp vision, causing deficits in eye-hand coordination needed for manual tasks. There have been few studies of visuo-motor rehabilitation training for deficits caused by macular scotomas. However, a recent study demonstrated that visuo-motor eye movement training dramatically improved reading ability of subjects with AMD. In addition, it has been shown that playing action video games can improve certain visual skills. Thus, a small but growing body of research suggests that it may be possible to ameliorate manual task deficits caused by AMD through computer-based visuo-motor rehabilitation training.
To test this idea, two visuo-motor training modules will be developed for low-cost tablet computers that subjects will use at home. Modules will be for, line and circle tracing, and video games. Both modules will involve PRL-hand coordination by moving a stylus on the tablet screen in response to stimuli. Line and circle tracing will develop eye-hand coordination skills needed for printing. The video game module will provide practice in PRL-hand coordination. Progress in PRL-hand coordination will be automatically recorded on the tablet-computer.
Changes in manual task performance from the training modules will be assessed after each training module using previously developed Scanning Laser Ophthalmoscope (SLO) tests of maze-tracing, and printing. The SLO will also be used to determine the position and fixation stability of the subject's PRL and the retinal position of the scotoma. SLO testing will be repeated three months after all training. Digitized SLO video images showing the hand, stylus, and object on the retina will be measured and analyzed. Several performance measures will be derived from the SLO image analysis including maze-tracing accuracy, printing legibility, retinal area of the stylus, percentage of time the stylus is in the scotoma, and PRL retinal area. This data will be statistically analyzed to determine whether visuo-motor training with the computer tablets improves manual task performance and whether one module is more effective than other.
There will be six groups of five subjects. Subjects will be assigned as they are recruited to a group until the group is full. Two groups will have training delayed by 6 months and will be tested on the SLO 4 times to assess changes in the dependent measure without training. Following training on each module, subject will be tested on maze tracing and printing in the SLO. Two groups undergo four SLO tests without training and begin training six months later.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Missouri
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Kansas City, Missouri, United States, 64128
- Kansas City VA Medical Center, Kansas City, MO
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Bilateral macular scotomas
- Preferred Retinal Locus (PRL) in at least one eye
- Visual acuity 20/400 or better in at least one eye
- No peripheral visual field loss
- No medications that could affect motor control
- Normal arm/hand range of motion
- Pass cognitive ability exam
Exclusion Criteria:
- No macular scotomas
- Visual acuity of 20/30 or better
- Medications that affect motor control
- Limited arm/hand range of motion
- Fail cognitive ability exam
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Visuo-motor training for low vision
All participants undergo training on scotoma awareness, Line and Circle Tracing and Video games
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Participants will undergo training on three developed software modules on Samsung Galaxy Note Pro tablets to see their effect on low vision rehabilitation
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Improvement in Eye-hand Coordination
Time Frame: base line, pre-test, post tracing and videogames training
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Maze tracing represents the fine eye-hand coordination needed for a wide variety of manual tasks and an improvement in maze tracing indicates an improvement in eye-hand coordination
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base line, pre-test, post tracing and videogames training
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Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Stylus to Eclipse Area
Time Frame: Base line, Pre and Post training (approximately 3 months)
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Base line, Pre and Post training (approximately 3 months)
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Collaborators and Investigators
Investigators
- Principal Investigator: George T Timberlake, PhD, Kansas City VA Medical Center, Kansas City, MO
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- C1000-R
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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