Which term describes the use of facial vision and echolocation for obstacle perception in WWII veterans?

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Facial vision refers to the use of the visual information available across the face area to detect nearby obstacles, often in combination with other sensory cues. In this context, WWII veterans with limited vision could still glean environmental information through the portion of vision available close to the face, and they supplemented this with auditory cues like echolocation to gauge distance and position of objects. The term facial vision specifically captures the idea of relying on vision centered on the face and near-space perception, rather than relying solely on distant or central vision. The addition of echolocation describes how auditory information complements that visual input to enhance obstacle detection. The other options describe either only the auditory method, a generic idea, or a named technique that isn’t the descriptor being tested.