2102369 PERCLOS percentage of eye closure time 11 2102365 PERCLOS Percentage of Eye Closures 3 2102366 PERCLOS percent eyelid closure 2 2102364 PERCLOS percentage eye-closure 2 2102363 PERCLOS percent of slow eyelid closures 1 2102368 PERCLOS percentage of eyes closed 1 2102367 PERCLOS percentage of time that the eyes were closed 1