Rosenfield M, Gilmartin B
Schnurmacher Institute for Vision Research, SUNY/State College of Optometry, New York.
Optom Vis Sci. 1990 Feb;67(2):74-9. doi: 10.1097/00006324-199002000-00002.
Proximal stimuli to accommodation were assessed by comparing the open-loop accommodative responses (AR's) to stimuli placed at viewing distances of 5 m (0.2 D) and 0.33 m (3D) in 10 late-onset myopes (LOM's) and 10 emmetropes. The accommodation and vergence loops were opened by subjects viewing targets monocularly through 0.5-mm pinholes. Pre- and post-task levels of tonic accommodation (TA) were used to assess the accommodative adaptation induced by the task. For the 0.2 D condition there was no significant difference between pre-task TA, within-task AR, or post-task TA, indicating that accommodation was open-loop throughout this distal condition. When viewing the 3 D target both refractive groups exhibited significant increases in AR, emmetropes showing higher levels of proximally induced accommodation (PIA) when compared with LOM's. The data indicate that target proximity will influence AR even when both blur and vergence cues have been stabilized.
通过比较10名迟发性近视患者（LOM）和10名正视者在5米（0.2 D）和0.33米（3 D）视距下对刺激的开环调节反应（AR），评估调节的近端刺激。受试者通过0.5毫米针孔单眼观察目标，从而打开调节和聚散环。使用任务前和任务后的紧张性调节（TA）水平来评估任务诱导的调节适应。对于0.2 D的情况，任务前TA、任务中AR或任务后TA之间没有显著差异，表明在这种远距离条件下调节是开环的。当观察3 D目标时，两个屈光组的AR均显著增加，与LOM相比，正视者表现出更高水平的近端诱导调节（PIA）。数据表明，即使模糊和聚散线索已经稳定，目标距离仍会影响AR。
