Glare is an intense and blinding light. For example, glare can be caused by the brightness of oncoming headlights or sun light at dawn or dusk. It can prevent a driver from seeing an approaching vehicle, an open car door, or pedestrian crossing the roadway.

Glare resistance is the extent to which a driver can still see objects and events, while facing a source of glare. Such as the rising or setting sun or bright light from oncoming headlights.  Resistance is best achieved by using tinted windows, visibility screens, sun glasses and visors.

Glare recovery is the speed with which a driver\'s vision returns to normal after being exposed to glare. Glare resistance and recovery are important for being able to drive safely during sunset or after dark.  Glare resistance and recovery deteriorate with age; older drivers must drive more cautiously at night or not at all. This is called night blindness.