The typing speed achieved using the keyboard was
compared with that achieved using an on-screen keyboard
(Windows XP, Microsoft, USA) and Dasher (AEGIS project,
United Kingdom). Dasher is an information-efficient text-entry
interface that is driven by natural and continuous pointing
Figure 1. The method to control the mouse pointer by gyro
sensors
Figure 2. Photograph wearing the goggle equipped with
infrared sensors
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gestures. Dasher is an effective text-entry system in cases
where a full-size keyboard cannot be used [15].