On the plastic arm of the bed, beside the cup of water and some sort of lozenge which is not only tangy and cleansing but also lightly soothing, she finds her glasses. She taps once to wake them and twice more to engage audio, feeling the bud extrude delicately to touch the inner surfaces of her ear. This is the Witness model, intended for a variety of situations, including those where speech may not be desirable. She need only form the words as if she intended to speak them, and the software will read her neck and mouth and understand.