When I'm riding my bicycle at night on a street without streetlights (or with widely spaced streetlights), I can't see where I'm going if there's an oncoming vehicle. I just go straight and hope there's nothing in the way.
It gets even worse out in the country where I live. Driving in pitch darkness in a sports car that's low to the ground and having every other oncoming vehicle be a full-size pickup truck is a recipe for almost constant blindness because their headlights are exactly at my eye level. That's when you automatically look away to the side and hope a deer hasn't just jumped out behind that truck, into the road.
Same here! (I tend to use my left hand as a shade/blind.) I especially hate it when I have a migraine.
Once at a traffic light a semi-tractor trailer rig pulled in behind me. He actually turned his headlights off until we started moving again. Very unusual courtesy.
In my experience it's similar with a bike and a car: as the oncoming vehicle approaches, it actually helps light up the road from their end. But the exact moment it passes, well, for few moments there's no way to see anything.
