If you're driving at night and a car or other vehicle is approaching you with there high beams on you should immediately turn your headlights to low beam if they're on high beam as keeping your headlights on high beam can blind both of you.
But when a vehicle is approaching your vehicle with their high beams on and they don't turn their high beams off you should look towards the right edge of the lane you're driving in to avoid being blinded from the head lights.