Speed and accuracy of saccades, vergence and combined eye movements in subjects with strabismus before and after eye surgery
Speed and accuracy of saccades, vergence and combined eye movements in subjects with strabismus before and after eye surgery
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DOI：
10.1016/j.visres.2008.12.006
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发表时间：
2009-02-20
期刊：
影响因子：
1.8
通讯作者：
Kapoula, Zoi
中科院分区：
文献类型：
--
作者：
Bucci, Maria Pia;Bremond-Gignac, Dominique;Kapoula, Zoi
本研究的目的是探讨早发性会聚性或发散性斜视的年轻受试者在自然空间中的水平眼运动（扫视、聚散和联合运动）的时空特征。测试了9名年轻受试者（8-20岁）：3名发散性斜视，6名会聚性斜视。一个标准的范例是用来引起纯水平扫视在远距离和近距离观看，纯聚散沿着正中面（收敛和发散）和扫视与聚散运动相结合。通过光电装置记录双眼的水平眼球运动。在手术前记录眼球运动，对于大多数受试者，在手术后记录两次。手术前，单纯或联合形式的会聚和发散运动的准确性相对于正常值较差。平均收敛速度也异常缓慢。斜视手术显著提高了这些类型的眼球运动的准确性。术后单纯会聚运动速度和发散联合运动速度明显增加。我们的结论是，差的聚散眼运动的性能，特别是那些发现在斜视患者的收敛可能是由于在中央结构的感官差异输入相关的损害。由眼睛的重新排列促进的适应机制可能是在斜视眼手术后我们的受试者中观察到的聚散度性能改善的起源。(C)2008爱思唯尔有限公司保留所有权利。
The purpose of the study was to examine spatio-temporal characteristics of horizontal eye movements in the natural space (saccade, vergence and combined movements) in young subjects with early onset convergent or divergent strabismus. Nine young subjects (8-20 years old) were tested: three with divergent strabismus, six with convergent strabismus. A standard paradigm was used to elicit pure horizontal saccades at far and at close viewing distance, pure vergence along the median plane (convergence and divergence) and saccades combined with vergence movements. Horizontal eye movements from both eyes were recorded by a photoelectric device. Eye movements were recorded before surgery, and, for the majority of the subjects, two times after surgery. Before surgery the accuracy of convergence and divergence movements in their pure or combined form was poor with respect to normal values. The mean velocity of convergence was also abnormally slow. Strabismus surgery improved significantly the accuracy of these types of eye movements. The speed of pure convergence and of divergence combined movements increased significantly after surgery. We concluded that poor vergence eye movement's performance, particularly those found for convergence in strabismic subjects could be due to impairment in the central structures related to sensory disparity inputs. Adaptive mechanisms promoted by the realignment of the eyes could be at the origin of the improvement in the vergence performances observed in our subjects after strabismus eye surgery. (C) 2008 Elsevier Ltd. All rights reserved.