Dynamic control of ocular disaccommodation: First and second-order dynamics

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Abstract

Velocity and acceleration characteristics provide valuable information about dynamic control of accommodation. We investigated velocity and acceleration of disaccommodation (near-far focusing) from three starting positions. Peak velocity and peak acceleration of disaccommodation increased with the proximity of starting position however for a given starting position they were invariant of response magnitude. These results suggest that all disaccommodation responses are initiated towards a constant primary destination and are switched mid-flight to attain the desired final position. Large discrepancies between the primary destination and desired final position appear to produce overshoots and oscillations of small responses from proximal starting positions. © 2005 Elsevier Ltd. All rights reserved.

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Bharadwaj, S. R., & Schor, C. M. (2006). Dynamic control of ocular disaccommodation: First and second-order dynamics. Vision Research, 46(6–7), 1019–1037. https://doi.org/10.1016/j.visres.2005.06.005

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