This QuickTime[tm] movie shows a synthesized normal human eye looking about, in the range of about ±30∞. The color saturation of the muscles is proportional to tension. The muscle in the foreground is the ``lateral rectus'', and the clicking sound indicates the effective firing rate of lateral rectus motor neurons.
The Orbit moov was created with the Orbit[tm] gaze mechanics simulation program, Convert To Movie[tm], and QuickTime[tm]