He could turn off a light and then jump into his bed before the room got dark.

VOA: special.2009.01.24

The Northwestern University researcher took part in a study that found a way to turn off the immune system in mice with arthritis.

VOA: special.2010.03.16

A signal from the TV tells each side of the glasses when to turn on and off, showing each eye slightly different images that create the sense of depth.

VOA: special.2010.01.26