Short-term adaptation of accommodation, accommodative vergence and disparity vergence facility.
Short-term adaptation of accommodation, accommodative vergence and disparity vergence facility.
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调节、调节聚散和视差聚散设施的短期适应。
DOI：
10.1016/j.visres.2012.03.013
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发表时间：
2012
期刊：
影响因子：
1.8
通讯作者：
Schor,CliftonM
中科院分区：
文献类型：
--
作者：
Maxwell,James;Tong,Jianliang;Schor,CliftonM
先前的研究发现，受试者可以通过视觉练习来增加调节速度，如铅笔俯卧撑，脚蹼，布罗克字符串和类似的和无数的文件已经显示出改善住宿设施（速度）和充分性（振幅）在视觉训练后使用主观测试，但很少有客观测量正常受试者或诊断为屈光不正的患者在训练前后的调节异常缓慢的动力学（英语：Abnormally slow dynamics）。调节是由模糊直接驱动的，或者是由来自聚散度系统的神经交联间接驱动的。到目前为止，还没有研究客观地测量了视觉训练前后的调节和视动-聚散度，以及聚散度在调节速度中的作用。在本研究中，使用Purkinje眼动仪/视力计测量了正常受试者在类似脚蹼的任务中训练前后的调节和旋转-聚散度，在该任务中刺激在0和2.5D之间步进并返回超过200个周期。大多数受试者的调节速度增加，以及他们的旋转聚散速度。在训练前和训练后，交替性聚散导致调节反应约77 ms和100 ms，并且聚散导致在具有高调节和聚散速度的受试者中最突出，并且聚散导致倾向于随着调节速度的增加而增加。我们推测，意志性聚散可能通过聚散-调节交叉连接的方式帮助调节速度的增加。
Previous studies have found that subjects can increase the velocity of accommodation using visual exercises such as pencil push ups, flippers, Brock strings and the like and myriad papers have shown improvement in accommodation facility (speed) and sufficiency (amplitude) using subjective tests following vision training but few have objectively measured accommodation before and after training in either normal subjects or in patients diagnosed with accommodative infacility (abnormally slow dynamics). Accommodation is driven either directly by blur or indirectly by way of neural crosslinks from the vergence system. Until now, no study has objectively measured both accommodation and accommodative–vergence before and after vision training and the role vergence might play in modifying the speed of accommodation. In the present study, accommodation and accommodative–vergence were measured with a Purkinje Eye Tracker/optometer before and after normal subjects trained in a flipper-like task in which the stimulus stepped between 0 and 2.5diopters and back for over 200 cycles. Most subjects increased their speed of accommodation as well as their speed of accommodative vergence. Accommodative vergence led the accommodation response by approximately 77ms before training and 100ms after training and the vergence lead was most prominent in subjects with high accommodation and vergence velocities and the vergence leads tended to increase in conjunction with increases in accommodation velocity. We surmise that volitional vergence may help increase accommodation velocity by way of vergence–accommodation cross links.