I do a lot of riding on the road (often rural). What I've discovered is that with a dim light, my eyes dark-adapt. Then when cars pass, inevitably they'll blast me with high beams.

They are more likely to dim their lights if I have bright lights on my bike (and I'll direct the light towards the ground when they dim theirs).

I'm hoping to have some shaped beam lights to experiment with shortly.

Anyway, the general rule when blinded by a vehicle with the lights on high is
With brighter bike lights one's eyes aren't as dark adapted, and it is easier to adjust to the (usually dim) car lights.

I crashed into a ditch a couple of months ago because I was blinded, and there was no fog line to follow, and thus I couldn't discern road vs ditch. Fortunately I wasn't going very fast, and there was no water.

We have one local median strip bike path. Someone had the bright idea of putting in a bunch of white lights 10 to 15 feet in the air. Whew!!! Blinding lights everywhere. Fortunately, the city doesn't maintain their lights and most are burnt out

Tall street lights can be helpful.