We measured input time using on-screen keyboard. The
string used in the measurement was “This is a new head
mouse.” The times required for clicking by using the general
mouse and the proposed mouse were about 17.2 ± 1.6 s and
71.1 ± 27.7 s, respectively. The time required in the case of the
proposed mouse was around four times that in the case of the
general mouse. This experiment required more time than
previous experiments even though the numbers of clicks were
not very different. For this reason, each key on the on-screen
keyboard was smaller than the 50-pixel square. The times
required in the case of Quick Glance and Camera Mouse were
230 ± 32.7 s and 90 ± 5.1 s, respectively. These times were
greater than that in the case of the proposed mouse by factors
of around 3 and 1.3, respectively.