Abstract
There is little information on the accommodative response to stimuli having naturalistic motion on the retina. In the present experiment, the steady-state accommodative response at various dioptric levels was assessed with a Hartinger coincidence optometer as sinusoidal frequency of a small target was systematically altered across the horizontal foveal region (+/- 2 degrees). The steady-state accommodative response became less accurate as target oscillation frequency increased, approaching the tonic accommodation level when the frequency was between 0.5 and 1 Hz (corresponding to peak velocities of 6.3 and 12.6 deg s-1, respectively). These results suggest that the accommodation system is reasonably robust to naturally-occurring retinal-image motion.
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