During a SNS dump, approximately what percentage of peripheral vision is lost?

The correct choice indicates that during a sudden neurogenic stunning (SNS) dump, approximately 70% of peripheral vision is lost. This significant loss can be attributed to the physiological impacts of the SNS on the visual processing system, particularly the way stress or rapid changes in emotional states can affect visual perception.

In stressful situations, the body's neurohormonal responses prioritize central vision and critical situational awareness, which can reduce the effectiveness of peripheral visual fields. This shift can severely impair a person’s ability to detect stimuli outside of their direct line of sight, which is crucial for safety and situational awareness during high-stress scenarios.

The other options reflect varying levels of potential peripheral vision loss, but 70% is a benchmark frequently cited in the context of SNS responses. Understanding this loss is essential for recognizing how stress influences not only visual function but also overall situational awareness, which is critical in threat detection and response scenarios.