针对阶跃刺激的客观和主观调节的同步测量。

PURPOSE: This study aimed to evaluate differences in objective and subjective accommodation dynamically and simultaneously. METHODS: Thirty-four pre-presbyopic healthy volunteers (mean age ± SD, 41.0 ± 3.2 years) participated in this study. Initially, the reaction time for detecting a change in the target was measured at near. Dynamic accommodation was then monocularly recorded using an open-view Shack-Hartmann aberrometer and compared with the amplitude and velocity of subjective accommodation. RESULTS: The objective amplitude of accommodation (0.97 ± 0.32 diopter [D]) was significantly greater than the subjective amplitude of accommodation (0.62 ± 0.43 D; P < 0.001). The accommodative velocity was significantly faster for the "before the accommodation" response time (0.47 ± 0.38 D/s) than the "after the accommodation" response time (0.21 ± 0.22 D/s; P = 0.007). CONCLUSIONS: The human eye under the monocular condition quickly adjusts to the focal plane to clearly archive the nearby object, and the focal plane thereafter is slowly and accurately adjusted to the visual target after visual recognition.

目的：本研究旨在动态且同时评估客观和主观调节的差异。

方法：34 名未出现远视的健康志愿者（平均年龄±标准差，41.0±3.2 岁）参与了本研究。首先，在近距测量检测目标变化的反应时间。然后使用开放式 Shack-Hartmann 像差仪单眼记录动态调节，并与主观调节的幅度和速度进行比较。

结果：客观调节幅度（0.97±0.32 屈光度[D]）明显大于主观调节幅度（0.62±0.43 D；P<0.001）。“调节前”反应时间的调节速度（0.47±0.38 D/s）明显快于“调节后”反应时间（0.21±0.22 D/s；P=0.007）。

结论：在单眼条件下，人眼迅速调整焦平面以清晰地记录近距离物体，此后，在视觉识别后，焦点平面会缓慢且准确地调整到视觉目标。