Can special prisms in a VR headset help people with tunnel vision avoid collisions?

This study tests a virtual reality headset that uses special prisms to expand the field of view for people with tunnel vision or hemianopia (blindness in half the visual field). Fifteen participants will walk in a real environment while wearing the headset and respond to virtual oncoming pedestrians. The goal is to see if the prisms help them detect hazards faster and move more safely.