Before you smartazzes start in I am not talking about the hooters on some drivers or lot lizzards, I am talking about the headlights on your truck. My wife and I have noticed that there are hundreds of trucks on the road that their headlights are either pointed straight to the ground in front, or one light is blinding pilots in the sky and people in their homes on the side of the road or the lights are crossed over each other. Both O/O and company drivers are driving these trucks.
Replacement of a headlight, bodywork or just the jolting of the road can make the adjustments off. So if you find that you cannot see well at night it may be your headlights, and not your eyesight. For those who have no idea on how to adjust your lights, there are two screws next to the headlight on the outside or inside (depends on model of truck/type of headlight). One screw is for moving it up/down and the other is for left/right. Make your adjustments in the dark with the headlights pointed towards a wall or place an object on the ground at the desired level for each light (gloves work) and align them. It may take a couple of adjustments over a few nights to get the desired level. Try to make it a level that doesn't have the oncoming vehicles flashing their high beams at you. There are also more in depth "how to's" on the internet, just search by "adjusting headlights" and the same technique applies to cars or trucks. This topic can also be applied to your personal vehicles.