Which medical conditions commonly require clearance before flight?

• A. Mild seasonal allergies
• B. Occasional headaches
• C. Myopia
• D. Uncontrolled diabetes, recent seizures, significant cardiovascular disease, severe cardiopulmonary disorders, or other conditions that could cause sudden incapacitation

Answer: (D)

Keeping aircrew safe hinges on avoiding any condition that could lead to sudden incapacitation in flight. Uncontrolled diabetes, recent seizures, significant cardiovascular disease, severe cardiopulmonary disorders, or other conditions that could suddenly impair function are the situations that commonly trigger preflight medical clearance, because the risk of abrupt deterioration is real and the flight environment offers limited emergency support. The aviation medicine review looks at stability, treatment, and prognosis to determine if flying is safe. By contrast, mild seasonal allergies, occasional headaches, or myopia are typically manageable with standard care or corrective lenses and do not inherently pose a sudden incapacitation risk in flight.