Abstract: A vehicle windshield includes a light passage control medium extending therealong. The medium responds to light source position to produce one or more opacity-controlled spots to at least partially block the light reaching a vehicle operator's/occupant's eyes. Optionally, an operator control may be adjusted by hand, foot, voice, or the like to adjust spot characteristics such as location, number, size, edge feathering, and the like. A detector to determine position of one or more vehicle operator eyes is also optional. The vehicle may be an on-road type like an automobile or truck, an off-road vehicle (such as dump truck, crane, backhoe, bulldozer, or cement truck), an aircraft (of the fixed wing and/or rotary wing type), a train (light or heavy rail, commuter or freight), any manner of racing vehicle or a motorcycle where a helmet worn by the operator includes the windshield and medium.

Abstract: A vehicle windshield includes a light passage control medium extending therealong. The medium responds to light source position to produce one or more opacity-controlled spots to at least partially block the light reaching a vehicle operator's/occupant's eyes. Optionally, an operator control may be adjusted by hand, foot, voice, or the like to adjust spot characteristics such as location, number, size, edge feathering, and the like. A detector to determine position of one or more vehicle operator eyes is also optional. The vehicle may be an on-road type like an automobile or truck, an off-road vehicle (such as dump truck, crane, backhoe, bulldozer, or cement truck), an aircraft (of the fixed wing and/or rotary wing type), a train (light or heavy rail, commuter or freight), any manner of racing vehicle or a motorcycle where a helmet worn by the operator includes the windshield and medium.