Dark Adaptation

Dark adaptation is the physiological process by which the eyes adjust to low-light conditions to improve night vision. This process takes approximately 30 minutes to complete and can be instantly degraded by exposure to bright white light, requiring the adaptation process to restart. Pilots should use red or dim cockpit lighting at night to protect their dark adaptation.

Key Points

• •Dark adaptation takes approximately 30 minutes for the eyes to fully adjust to darkness.
• •Exposure to bright white light rapidly destroys dark adaptation, requiring the process to begin again.
• •Protecting dark adaptation is essential for effective night scanning and collision avoidance.

Related Terms