Academic Block 1 UPT Phase 2.5 – Aerospace Physiology (AP 190) Practice Test

During high G maneuvers, pilots can experience tunnel vision, which is a narrowing of the field of vision. This occurs because the increased gravitational forces can cause blood to pool in the lower extremities, reducing blood flow to the brain and eyes. As a result, peripheral vision becomes compromised, leaving the pilot with a more concentrated view straight ahead. This phenomenon can significantly impact situational awareness, which is critical in aviation.

The other choices present conditions that do not typically arise specifically from high G maneuvers. Blindness can result from severe physiological stress or lack of blood flow, but it is not commonly the direct result of high G forces alone. Double vision may occur due to various neurological or ocular conditions but is not specifically linked to high G forces like tunnel vision is. Complete clarity does not align with the physiological changes experienced under high G forces.