期刊
VISION RESEARCH
卷 45, 期 1, 页码 17-28出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2004.07.040
关键词
accommodation dynamics; step response; acceleration
资金
- NATIONAL EYE INSTITUTE [R01EY003532] Funding Source: NIH RePORTER
- NEI NIH HHS [EYO-3532, R01 EY003532-25] Funding Source: Medline
Position and velocity of accommodation are known to increase with stimulus magnitude, however, little is known about acceleration properties. We investigated three acceleration properties: peak acceleration, time-to-peak acceleration and total duration of acceleration to step changes in defocus. Peak velocity and total duration of acceleration increased with response magnitude. Peak acceleration and time-to-peak acceleration remained independent of response magnitude. Independent first-order and second-order dynamic components of accommodation demonstrate that neural control of accommodation has an initial open-loop component that is independent of response magnitude and a closed-loop component that increases with response magnitude. (c) 2004 Elsevier Ltd. All rights reserved.
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