The investigators are developing a new test of pedestrian hazard detection in virtual reality (VR) head-mounted display (HMD) headset, which shows virtual oncoming pedestrians in 3D while subjects are walking in real-world environment, for evaluation of visual field expansion to improve mobility in people with visual field loss.
The investigators will develop a new pedestrian hazard detection test and conduct a single arm interventional clinical trial to evaluate simulated low vision assistive devices in a sample of field loss subjects. Pedestrian detection performance with and without field expansion information will be tested and compared. The study will include 1 to 4 visits (each 2 to 4 hours) depending on the number of trials and experimental conditions (e.g., with and without simulated assistive devices) the subject is comfortable completing. The time between visits may vary depending on scheduling constraints and availability. During each visit, the subject will complete a series of simulated collision avoidance trials in VR requiring the detection and natural avoidance of a colliding pedestrian (alongside non-colliding pedestrians) while physically walking through an empty corridor. The study will be considered minimal-risk since there will be no physical obstacles that present actual collision risks.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
15
Overlaid small window on HMD to show the part of the scene in the blind field into portions of the participants' remaining, seeing, field of vision
Schepens Eye Research Institute
Boston, Massachusetts, United States
Response time
During the pedestrian detection task, average response time to the colliding pedestrian with and without prisms
Time frame: Through study completion, an average of four months
Head movement range
During the pedestrian detection task, lateral and vertical head movement range to check the head scanning range
Time frame: Through study completion, an average of four months
Walking speed
During the pedestrian detection task, the physical walking speed of the subject
Time frame: Through study completion, an average of four months
Pedestrian detection rate
Proportion of simulated pedestrians detected (in HMD walking)
Time frame: Through study completion, an average of four months
Error rate
Proportion of false alarms and missed targets to total targets
Time frame: Through study completion, an average of four months
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