Quote from Earth: "She took a subvocal input device from its rack and placed the attached sensors on her throat, jaw, and temples. A faint glitter in the display screens meant the machine was already tracking her eyes, noting by curvature of lens and angle of pupil the exact spot on which she focused at any moment.

She didn't have to speak aloud, only intend to. The subvocal read nerve signals, letting her enter words by just beginning to will them. It was much faster than any normal speech input device... and more cantankerous as well. Jen adjusted the sensitivity level so it wouldn't pick up each tiny tremor - a growing problem as her once athletic body turned wiry and inexact with age. Still, she vowed to hold onto this rare skill as long as possible."

Once again Sci Fi pwns reality...