If a pilot experiences sudden unilateral vision loss during flight, what is the recommended immediate action?

If a pilot experiences sudden unilateral vision loss during flight, what is the recommended immediate action?

• A. Climb to a higher altitude to improve oxygenation
• B. Ignore and continue flight
• C. Land as soon as practical and arrange urgent medical evaluation; administer supplemental oxygen if available
• D. Seek immediate in-flight medical consultation via radio

Answer: (C)

Sudden unilateral vision loss during flight is an emergency that requires rapid medical evaluation to protect vision and safety. The best immediate action is to land as soon as practical and arrange urgent medical evaluation; administer supplemental oxygen if available to support tissue oxygenation while you descend. Rationale: this kind of vision loss can be caused by time-sensitive ocular emergencies such as retinal detachment or retinal artery occlusion, where delay often leads to permanent damage. Reaching a medical facility quickly allows ophthalmologic assessment and appropriate treatment to begin as soon as possible. Raising altitude would reduce ambient oxygen and could worsen retinal oxygen delivery, so it’s not helpful. Ignoring the symptom or simply continuing flight risks prolonged delay in care. Seeking in-flight medical consultation is useful, but it should not replace rapid descent to obtain urgent medical evaluation and treatment.

Sudden unilateral vision loss during flight is an emergency that requires rapid medical evaluation to protect vision and safety. The best immediate action is to land as soon as practical and arrange urgent medical evaluation; administer supplemental oxygen if available to support tissue oxygenation while you descend.

Rationale: this kind of vision loss can be caused by time-sensitive ocular emergencies such as retinal detachment or retinal artery occlusion, where delay often leads to permanent damage. Reaching a medical facility quickly allows ophthalmologic assessment and appropriate treatment to begin as soon as possible.

Raising altitude would reduce ambient oxygen and could worsen retinal oxygen delivery, so it’s not helpful. Ignoring the symptom or simply continuing flight risks prolonged delay in care. Seeking in-flight medical consultation is useful, but it should not replace rapid descent to obtain urgent medical evaluation and treatment.