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首页> 外文期刊>Optometry and vision science: official publication of the American Academy of Optometry >Effect of vergence adaptation and positive fusional vergence training on oculomotor parameters.
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Effect of vergence adaptation and positive fusional vergence training on oculomotor parameters.

机译：融合适应和积极融合融合训练对动眼神经参数的影响。

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PURPOSE: Clinical studies have shown that positive fusional vergence (PFV) can be trained through a program of orthoptic exercises. Models of accommodation and vergence predict that training PFV would require a reduction in the convergence accommodation (CA) cross-link. Recent investigations have found that the CA/C ratio is not changed in a clinical population after orthoptics. We hypothesized that such orthoptic programs may instead act to reduce CA through changes in the relationship between fast and slow vergence components. METHODS.: Eleven visually normal subjects were tested. Phoria adaptation to a 12-Delta base-out (BO) wedge prism and the resulting CA responses were monitored every 3 min for 15 min to a DoG target at 0.4 m. These measures were repeated after 2 weeks of orthoptics. Phorias, stimulus accommodative convergence (AC)/A and CA/C ratios, and PFV amplitudes at near were also determined. Before the orthoptics program, these measures were repeated under "adapted" conditions. RESULTS: Phoria adaptation following prolonged viewing through the 12-Delta BO wedge prism was associated with a concomitant reduction in the CA. These changes were asymptotic over time with 95% of the change occurring within the first 3 to 6 min. After 2 week of orthoptics, the rates and magnitudes of both phoria adaptation and CA reduction increased significantly (p < 0.01). PFV at 40-cm limits showed increases with orthoptics and under vergence adaptation. CA/C and AC/A ratios were unchanged after orthoptics, but the former was reduced, and the latter increased under the vergence adapted condition. CONCLUSIONS: Orthoptics acts to change the time constant and magnitude of vergence adaptation to BO prisms, which leads to a concomitant reduction of CA over a similar time course. This process appears to underlie the increase in positive fusion limits. Although reductions in CA/C ratio occur under the vergence adapted state, this ratio is not directly changed with orthoptics.
机译：目的：临床研究表明，可以通过矫正运动程序训练正融合力（PFV）。适应和融合模型预测，训练PFV将需要减少融合适应（CA）交叉链接。最近的研究发现，矫正术后的临床人群中CA / C比没有改变。我们假设这样的矫正程序可以通过快速和慢速收敛分量之间的关系变化来减少CA。方法：对11名视觉正常的受试者进行了测试。每3分钟监测一次Phoria对12-Delta基向外（BO）楔形棱镜的适应情况，以及由此产生的CA响应，持续15分钟，以监测0.4 m处的DoG目标。矫正2周后重复这些措施。还确定了耳鸣，刺激适应性收敛（AC）/ A和CA / C比率以及附近的PFV振幅。在进行骨科手术之前，在“适应”条件下重复这些措施。结果：长时间通过12-Delta BO楔形棱镜观看后，眼球适应症与CA的减少相关。这些变化随时间渐近，其中95％的变化在前3到6分钟内发生。矫正2周后，隐隐适应和CA降低的速率和幅度均显着增加（p <0.01）。 PFV在40厘米极限处显示出随着矫正和适应性的提高而增加。矫正后，CA / C和AC / A比没有变化，但是前者降低了，而后者在适应度的条件下增加了。结论：矫正术可以改变时间常数和对BO棱镜的散度适应幅度，从而导致在相似的时间过程中CA的同时减少。该过程似乎是增加正融合极限的基础。尽管在趋近适应状态下CA / C比值会降低，但该比值不会因矫正而直接改变。

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