Dynamics of Cover Test Eye Movements
Dynamics of Cover Test Eye Movements
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覆盖测试眼动的动力学
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
G. Mccormack
中科院分区：
文献类型：
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作者：
E. Peli;G. Mccormack
摘要单侧遮盖测试的眼动动力学，以前从未用客观记录系统进行过系统的研究，结果表明比教科书中的描述更为复杂。我们管理的覆盖测试，以九个heterophoric科目的机电封堵器。眼动记录使用红外光电技术。扫视和聚散运动的注视眼，观察到几乎所有的记录时，被遮盖的眼睛。这些运动被发现在内隐杆和外隐杆，并在大和小隐斜的情况下。这种运动以前描述了其他不对称的聚散任务，似乎遵守赫林的平等神经支配定律。发现优势眼，在明显的优势，导致较短的潜伏期和较大幅度的眼跳比发现非优势眼。这些大的扫视在每只眼睛中经常是不等幅度的。训练有素的科目似乎使用动态过冲，以增加这种扫视的不平等，从而达到在扫视聚散。运动后的应用程序的覆盖到一只眼睛，而大致类似于教科书的描述，他们被发现包含小的聚散漂移和重新固定（纠正）眼跳在非闭塞的眼睛。
ABSTRACT The dynamics of unilateral cover test eye movements, never before systematically investigated with an objective recording system, are shown to be more complex than textbook accounts of them. We administered the cover test to nine heterophoric subjects by means of electromechanical occluders. Eye movements were recorded using the infrared photoelectric technique. Saccadic and vergence movements of the fixating eye were observed in almost all records when the occluded eye was uncovered. These movements were found in esophores and exophores and in both large and small phoria cases. Such movements were previously described in other asymmetric vergence tasks and appear to obey Hering's law of equal innervation. Uncovering the dominant eye, in cases of clear dominancy, resulted in shorter latency and larger amplitude saccades than did uncovering the nondominant eye. These large saccades were frequently of unequal amplitude in each eye. Trained subjects appear to use dynamic overshoots to increase this saccadic inequality and thereby attain vergence during saccades. Movements after the application of a cover to one eye, while grossly similar to textbook descriptions of them, are found to contain small vergence drifts and refixation (correcting) saccades in the nonoccluded eye.