HD Day & Night Vision Visor drops down from your car's visor to block glare from headlights, streetlights, and the blinding sun. It is the only sun visor that reduces glare and turns your vision into “high definition”. Not only is this drop down visor HD, it's the only visor with a dual lens so you can block glare both during the day and at night. HD Visor has the same technology as the hot selling Night Driving glasses on the market.