| http://www.w3.org/ns/prov#value | - ontact with an upper eyelid muscle of the driver and to move downwardly and upwardly in concert with said upper eyelid muscle as it closes and opens, respectively; and a control unit electrically connected to said microswitch, the control unit including light means for providing a visual indication each time the driver's upper eyelid closes, the control unit further including adjustable time delay
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