Looking for a special kind of lens

dashcloud thought this was worth mentioning said
2

Hi, I'm trying to find a special glass/lens/whatever that helps with a issue someone I know has: terrible glare from car headlights (considerably more than the usual person does), making it extremely difficult to drive at night.
Sunglasses aren't a bad idea, but they introduce a new problem: now everything is dark, and it's hard to see the road anymore.
The fishermen glasses sold recently aren't too bad, but they still make everything darker, a little too much so.

Ideally, there would be some glass/lens/gadget that filters out headlights mostly, without appreciably darkening the road.

There may not be anything like this out there, but maybe someone here knows of a product I should be looking at or someone I should be talking to.