Flicker Vertigo

Flicker vertigo is an uncomfortable physiological reaction and potential spatial disorientation caused by exposure to a flickering light source. In aviation, it most commonly occurs from sunlight flashing through a slow-turning propeller or helicopter rotor blades. It can cause nausea, dizziness, or in severe cases, incapacitation.

Key Points

• •Flicker vertigo is typically triggered by sunlight passing through a slow-turning propeller or rotor blades.
• •Symptoms include nausea, dizziness, discomfort, and in severe cases, incapacitation.
• •Symptoms can be mitigated by changing engine RPM to alter the flicker frequency, or by looking away from the light source.

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