Low Vision Clinical Trial
Official title:
Efficacy of Enhancing Low Vision Mobility Thru Visual Training in Virtual World
Low vision patients have difficulty acquiring sufficient visual information in a timely manner for the purpose of performing challenging daily tasks, such as traveling independently and safely through busy streets. The advance of virtual reality techniques has provided a potential platform for training low vision patients to use their remaining vision more efficiently, but the key issue is always whether the patient's visual experiences in a virtual world can be transferred to the real world. The proposed study is designed to provide definite answer to this question.
Status | Completed |
Enrollment | 35 |
Est. completion date | March 2015 |
Est. primary completion date | March 2015 |
Accepts healthy volunteers | No |
Gender | Both |
Age group | 19 Years to 81 Years |
Eligibility |
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. |
Observational Model: Case Control, Time Perspective: Prospective
Country | Name | City | State |
---|---|---|---|
United States | The Clinical Eye Research Facility | Birmingham | Alabama |
Lead Sponsor | Collaborator |
---|---|
University of Alabama at Birmingham |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | The percentage of dangerous street crossing decisions and the street crossing decision safety scores | 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. | 3-5 1-hour visits | No |
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