Accommodative responses to eccentric and laterally-oscillating targets.
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.
Hung
G K
GK
Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 09855-0909.
Ciuffreda
K J
KJ
D000065:Accommodation, Ocular / Q000502:physiology*; D000328:Adult; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D013997:Time Factors; D014794:Visual Fields / Q000502:physiology