Sustained Fixation Induced Changes in Phoria and Convergence Peak Velocity
Sustained Fixation Induced Changes in Phoria and Convergence Peak Velocity
复制标题
DOI：
10.1371/journal.pone.0020883
复制
发表时间：
2011-06-17
期刊：
影响因子：
3.7
通讯作者：
Alvarez, Tara L.
中科院分区：
文献类型：
--
作者：
Kim, Eun H.;Vicci, Vincent R.;Alvarez, Tara L.
目的：探讨斜视适应对位于不同初始收敛位置的反应的会聚峰速度的影响。方法：使用单目显微镜红外边缘跟踪系统，记录6名正常双眼视觉受试者的对称性4度会聚阶跃反应和近分离性斜视(距正中线40 cm处)。采用两种不同的持续注视(沿被试中线旋转1度和16度)来研究裸眼是否对位于两个初始收敛位置(1度或‘远’步和12度或‘近’步)的收敛反应的峰值速度有影响。结果：在近(16度)和远(1度)持续注视任务后，裸眼显著适应(P<0.05)。
Purpose: This study sought to investigate the influence of phoria adaptation on convergence peak velocity from responses located at different initial vergence positions.Methods: Symmetrical 4 degrees convergence step responses and near dissociated phoria (measured at 40 cm from the subject's midline) were recorded from six subjects with normal binocular vision using an infrared limbus tracking system with a haploscope. Two different sustained fixations (1 degrees and 16 degrees convergent rotation along the subject's midline) were used to study whether phoria had an influence on the peak velocity of convergence responses located at two initial vergence positions (1 degrees or 'far' steps and 12 degrees or 'near' steps).Results: Phoria was significantly adapted after a sustained fixation task at near (16 degrees) and far (1 degrees) (p