If an oncoming pickup seems to wash out the lane markings for a moment, that is more than an irritation. Glare steals contrast, which means less time to spot a pedestrian, cyclist, animal or the edge of the road, especially in rain or on dark roads. In simple terms, headlight glare is light reaching your eyes instead of staying where it should: on the road.
Why it feels worse
Not every dazzling lamp is an illegal high beam. A normal low beam can still be harsh if the headlights are mis-aimed, the vehicle sits higher, the rear is heavily loaded, or an LED replacement bulb is fitted into a housing designed for halogen, creating scatter instead of a clean cut-off.
Your own car can make other drivers’ lights look much worse. Road salt film, a greasy windshield interior, worn wiper blades, scratches and an outdated glasses prescription can turn a sharp beam into a white haze; if you notice halos around lights even on clear nights, a vision check is sensible.
Fixes that help
The quickest improvement is usually cleaning and setup, not a gadget. Clean the inside and outside of the windshield properly, replace smeary blades, and use the rear-view mirror’s night setting or auto-dimming function if your car has one. Side mirrors should be adjusted so following traffic is not reflected straight back into your eyes, and ultra-bright aftermarket bulbs are best avoided unless the lamp housing is designed for them.
At the wheel, the trick is to stop feeding the glare. Do not stare at the oncoming lamps; look toward the right edge of your lane, ease off slightly, and leave a bigger gap to the vehicle ahead so you are not trying to track brake lights and oncoming headlights at the same time.
If other drivers keep flashing you, or your lights seem to light up road signs more than the pavement, have the aim checked. That matters after a bulb swap, minor front-end damage, suspension work or frequent heavy loading. A light that looks “very bright” is not the goal; a crisp, controlled beam pattern is.