Efficacy of Enhancing Low Vision Mobility Thru Visual Training in Virtual World
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ClinicalTrials.gov Identifier: NCT02310880 |
Recruitment Status :
Completed
First Posted : December 8, 2014
Last Update Posted : May 27, 2015
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Condition or disease |
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Low Vision |
Study Type : | Observational |
Actual Enrollment : | 35 participants |
Observational Model: | Case-Control |
Time Perspective: | Prospective |
Official Title: | Efficacy of Enhancing Low Vision Mobility Thru Visual Training in Virtual World |
Study Start Date : | September 2010 |
Actual Primary Completion Date : | March 2015 |
Actual Study Completion Date : | March 2015 |
Group/Cohort |
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Low vision (virtual street training)
Low vision subjects trained in virtual streets and observed in real streets
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Low vision (real street training)
Low vision subjects trained in real streets and observed in real streets
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- The percentage of dangerous street crossing decisions and the street crossing decision safety scores [ Time Frame: 3-5 1-hour visits ]The percentage of dangerous street crossing decisions is determined at real street corners during pre- and post-training evaluation sessions. The subject is asked to say "GO" when she feels it is the safest time to cross the street. A crossing decision is scored as dangerous if it is initiated in the red traffic light cycle or if there is < 25% of the "WALK" cycle left. The percentage is the total number of dangerous decisions divided by the total number of crossing decisions made during one evaluation session. The safety of a crossing decision is further quantified by recording the decision timing using a stopwatch and by converting the recorded time to a safety score. The safety score is a continuous scale between 0 and 1.0. The larger the safety score, the safer is the crossing decision. A statistically significant reduction in the percentage dangerous crossing decisions and an increase in the safety scores after training is an indication of successful skill learning and transfer.

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Ages Eligible for Study: | 19 Years to 81 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Ambulatory and have independent traveling as one of their rehabilitation goals.
- Participants with central field loss should have best corrected binocular visual acuity between 20/200 and 20/1000, but with relatively intact peripheral visual field (>80o).
- Participants with peripheral visual field loss should have >20/63 visual acuity and no more than 20 deg diameter but not less than 8 deg diameter visual field in the better eye.
Exclusion Criteria:
- Participants who have a mixture of central and peripheral field loss.
- Previous or current recipient of O&M training.
- Participants who have plans to receive O&M training during the study period.
- Age younger than 19 or older than 81.
- Significant cognitive impairment as determined with the Short Portable Mental Status Questionnaire (≥2 errors); inability to understand and speak English.
- Severe hearing impairment that interferes with interactions with O&M specialists.
- Inability or unwillingness to make visits required by the study.
- Not living in the Birmingham-Jefferson county area.
- Persons who have a history of epilepsy or who are prone to motion sickness or simulator aftereffect, determined by an epileptic seizure history inquiry and a Motion Sickness History Questionnaire.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02310880
United States, Alabama | |
The Clinical Eye Research Facility | |
Birmingham, Alabama, United States, 35294 |
Principal Investigator: | Lei Liu, PhD | University of Alabama at Birmingham |
Responsible Party: | University of Alabama at Birmingham |
ClinicalTrials.gov Identifier: | NCT02310880 |
Other Study ID Numbers: |
X100716003 |
First Posted: | December 8, 2014 Key Record Dates |
Last Update Posted: | May 27, 2015 |
Last Verified: | December 2014 |
Vision, Low Vision Disorders Sensation Disorders |
Neurologic Manifestations Nervous System Diseases Eye Diseases |