[Solved] Discuss how the forces of evolution operate on human populations today. Distressed: Experiencing anxiety, sorrow, or pain; often used to describe situations, individuals, or assets under severe stress. Peripheral Vision: That portion of vision that occurs outside the very center of gaze, allowing humans to detect movement and shapes not in the direct line of sight. Sclera: The white or sclerotic outer coat of the eye. Musculature: The system of muscles within the body, contributing to physical strength, movement, and posture.