Incorrectly aimed headlights can reduce the visibility of oncoming traffic, increasing the risk of a crash.
The headlights may be incorrectly adjusted too high and create a glare for oncoming traffic. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
What to do: Book it in at your next service. There is no deadline and no charge.