I am trying out some "night drive" sunglasses that I found in CVS which look exactly like this except the logo is "Solar Shield" and it was $20 on the rack:

Which I recommend so far as very satisfactory. Somehow bright headlights and glare are filtered out (no more a-hole blinding you on the MUP!) without degrading my vision at night, and the contrast in the dark is actually improved.

Night Driver Classic Large Square - Night Drivers