Benign Episodic Unilateral Mydriasis in a Flight Nurse.

Area of Science:

• Ophthalmology
• Aerospace Medicine
• Neurology

Background:

• Anisocoria, or unequal pupil size, can stem from benign episodic unilateral mydriasis, potentially linked to autonomic nervous system imbalances.
• While associated with migraines, asymptomatic cases exist, posing diagnostic challenges in excluding serious neurological conditions.
• Flight environments introduce unique factors like variable light and night vision device use, complicating assessments.

Observation:

• A 27-year-old female flight nurse deployed in Afghanistan presented with acute right-sided mydriasis.
• The patient reported no headache or migraine history; examination revealed a dilated, reactive right pupil that resolved spontaneously.
• An ophthalmologist confirmed the diagnosis of benign episodic unilateral mydriasis.

Findings:

• Benign episodic unilateral mydriasis can present acutely and resolve rapidly.
• A comprehensive history and physical examination are crucial for accurate diagnosis.
• Prompt diagnosis in deployed settings can prevent unnecessary, resource-intensive investigations.

Implications:

• Accurate diagnosis of benign episodic unilateral mydriasis is vital for operational readiness in military aviation.
• Rapidly resolving cases, like the one observed, may not necessitate grounding flight personnel.
• Clinical judgment regarding patient care capability and diagnosis is paramount in austere operational settings.