We used adaptive optics to determine the effect of monochromatic aberration dynamics on the level of chaos in the accommodation control system. Four participants viewed a stationary target while the dynamics of their aberrations were either left uncorrected, defocus was corrected, or all aberrations except defocus were corrected. Chaos theory analysis was used to discern changes in the accommodative microfluctuations. We found a statistically significant reduction in the chaotic nature of the accommodation microfluctuations during correction of defocus, but not when all aberrations except defocus were corrected. The Lyapunov exponent decreased from 0.71 ± 0.07 D/s (baseline) to 0.55 ± 0.03 D/s (correction of defocus fluctuations). As the reduction of chaos in physiological signals is indicative of stress to the system, the results indicate that for the participants included in this study, fluctuations in defocus have a more profound effect than those of the other aberrations. There were no changes in the power spectrum between experimental conditions. Hence chaos theory analysis is a more subtle marker of changes in the accommodation control system and will be of value in the study of myopia onset and progression.
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机译：我们使用自适应光学器件来确定单色像差动态对调节控制系统中混沌程度的影响。四名参与者查看了一个固定的目标，而其像差的动态未得到校正，散焦得到了校正，或者除散焦之外的所有像差都得到了校正。混沌理论分析被用来辨别适应性微波动的变化。我们发现，在散焦校正过程中，住宿微波动的混沌性质在统计学上显着降低，但在校正除散焦以外的所有像差时却没有。 Lyapunov指数从0.71±0.07 D / s（基线）降低到0.55±0.03 D / s（散焦波动的校正）。由于生理信号混乱的减少表明系统受到压力，结果表明，对于本研究中的参与者，散焦的波动比其他像差的波动具有更深远的影响。实验条件之间的功率谱没有变化。因此，混沌理论分析是适应控制系统变化的更微妙的标志，将在研究近视发作和进展中具有价值。
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