Final answer:
To avoid being blinded by the glare of approaching headlights, look slightly to the left side of the road.
Step-by-step explanation:
To avoid being blinded by the glare of approaching headlights, you should look slightly to the left side of the road. This helps to minimize the direct exposure to the bright lights. Closing one eye while driving is not recommended as it affects depth perception and can compromise safety on the road. Using sunglasses at night is also not recommended as it can further reduce visibility.