...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American Orthoptic Journal >A Case of Different Null Zones for Distance and Near Fixation
【24h】

A Case of Different Null Zones for Distance and Near Fixation

机译：距离和近距离注视不同零位区域的情况

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A compensatory head posture (CHP) is a common clinical feature of congenital motor nystagmus. It is usually caused by an eccentric null zone, which is the eye position where the nystagmus intensity (amplitude x frequency) is least. A patient adopts the posture to maximize the binocular visual acuity. Occasionally, a patient may have more than one null zone, leading to the adoption of different CHPs at various times.A 10-year-old boy with congenital motor nystagmus and orthophoria, and with good corrected vision in both eyes, presented with a face turn that had been noted since infancy. For distance fixation, he consistently adopted a left face turn due to a null zone in right gaze. For near fixation, he adopted a right face turn due to a null zone in left gaze. Eye movement recordings confirmed the different locations of the null zones for distance and near fixation.After a trial of base-out prisms to stimulate convergence, which eliminated his head posture at both positions, he underwent artificial divergence surgery. He has had a satisfactory result for 18 months after surgery with a satisfactory head posture and a well-controlled exophoria.Measures to induce convergence, with prisms and then surgery, can be an effective strategy to correct the head postures caused by two different null zones in a patient with congenital motor nystagmus.
机译：代偿性头部姿势（CHP）是先天性运动性眼球震颤的常见临床特征。它通常是由偏心的空区引起的，该区域是眼球震颤强度（振幅x频率）最小的眼睛位置。患者采用该姿势以最大化双眼视力。有时，患者可能会有多个虚假区域，导致在不同时间采用不同的CHP.10岁的男孩患有先天性运动性眼球震颤和眼球直视，并且双眼视力都很好，表现为面部从婴儿期开始就注意到的转折。对于固定距离，由于右眼注视区域为零，他始终采用左转弯。对于近距离注视，由于左眼注视区域为零，他采用了右转。眼动记录证实了距离固定和近视固定的无效区域的不同位置。在试验了底棱镜以刺激会聚后消除了两个位置的头部姿势后，他进行了人工发散手术。术后18个月，他的头部姿势令人满意，外ex控制良好，取得了令人满意的结果。采用棱镜然后再进行手术以诱导会聚的措施可能是纠正由两个不同的无效区域引起的头部姿势的有效策略先天性运动性眼球震颤的患者。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号