This study will evaluate a new approach to training people with visual field loss to scan when driving
Homonymous visual field loss is the loss of vision on the same side in both eyes. The most common types are hemianopia (the loss of one half of the field of vision) and quadrantanopia (the loss of one quarter of the field of vision). Hemianopia and quadrantanopia may cause difficulties in seeing objects on the side of the field loss. People with these types of field loss can compensate by scanning (looking) toward the side of the field loss. However, sometimes they might not scan sufficiently well resulting in delayed responses to hazards when driving. The purpose of this research study is to evaluate a new approach, "reminder-cue scanning training", to training people with homonymous visual field loss to scan when driving. Participants will receive reminder-cue scanning training in the driving simulator.Typically there will be three training sessions within about a 2-week period. In addition, participants will complete an evaluation in the driving simulator before and after the training.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
OTHER
Masking
NONE
Enrollment
30
Auditory reminders to scan when scanning to the side of the field loss is inadequate
Schepens Eye Research Institute of Mass Eye and Ear
Boston, Massachusetts, United States
RECRUITINGRate of early large head scans to the side of the field loss
Proportion of intersections at which an early large head scan was made to the side of the field loss
Time frame: Pre-training, post-training (1 week)
Detection rate for hazards on the side of the field loss
Proportion of hazards detected out of the total number of hazards on the side of the field loss
Time frame: Pre-training, Post-training (1 week)
Rate of early large head scans to the side of the field loss
Proportion of intersections at which an early large head scan was made to the side of the field loss
Time frame: Pre-training, post-training (up to 12 months)
Frequency of head scans to the side of the field loss
Number of head scans per intersection to the side of the field loss
Time frame: Pre-training, Post-training (up to 12 months)
Magnitude of head scans to the side of the field loss
Mean magnitude (in degrees) of head scans to the side of the field loss
Time frame: Pre-training, Post-training (up to 12 months)
Detection rate for hazards on the side of the field loss
Proportion of hazards detected out of the total number of hazards on the side of the field loss
Time frame: Pre-training, post-training (up to 12 months)
Response times to hazards on the side of the field loss
Mean time (in seconds) between the hazard appearing and the horn-press response
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Time frame: Pre-training, Post-training (up to 12 months)