ATPL: Vitamin A and possibly vitamins B and C are chemical factors and essential to good night vision:1. Vitamin deficiencies may decrease night vision performance2. An excess intake of vitamin A will improve night vision performance significantly3. Pilots should be carefully concerned to take a balanced diet containing sufficient vitamin A4. Vitamin deficiencies may decrease visual acuity in photopic vision but not in scotopic vision
Question 410, Human Performance and Limitations - ATPL - Airline Transport Pilot license
Explanation: Vitamin A and possibly vitamins B and C are chemical factors and essential to good night vision:1. Vitamin deficiencies may decrease night vision performance2. An excess intake of vitamin A will improve night vision performance significantly3. Pilots should be carefully concerned to take a balanced diet containing sufficient vitamin A4. Vitamin deficiencies may decrease visual acuity in photopic vision but not in scotopic vision