EFFICACY OF PRISM ADAPTATION IN ACQUIRED ESOTROPIA

回顾研究表明，只有50%的外科患者患有 后天性内斜视通过一次手术达到良好的眼球对齐效果。新的 有证据表明，术前使用棱镜，好眼睛 在约85%的用户中，一次操作即可实现对齐 获得性内斜视手术患者。一个多中心的，随机的， 前瞻性、临床试验，认真注意标准化和 建议进行无偏见的结果评估，以确定是否： 1.获得性内斜视患者手术效果较好 他们有术前棱镜适应，而不是没有 术前棱镜适应。 2.如果对棱镜适应有反应的患者更准确 通过操作棱镜自适应角度或原始角度进行校正 偏差。 3.如果存在输入变量的群集，(例如年龄、偏差大小、 感觉状态、屈光不正或AC/A比率)来帮助预测 患者更有可能对棱镜适应测试有反应。 为了回答这些问题，一项双重随机研究 都是精心设计的。三分之二的患者将被随机挑选去 术前通过棱镜适配。三分之一的患者会 根据常规测量的交叉量进行手术 考试技巧。在那些对棱镜有反应的患者中， 一半的人将根据所需的棱镜数量进行手术

Retrospective studies indicate that only 50% of surgical patients with acquired esotropia achieve good eye alignment with one surgery. New evidence indicates that with the preoperative use of prisms, good eye alignment can be achieved with one operation in approximately 85% of surgical patients with acquired esotropia. A multicenter, randomized, prospective, clinical trial with careful attention to standardization and unbiased outcome evaluation is proposed to determine if: 1. The surgical result in patients with acquired esotropia is better if they have preoperative prism adaptation than if they do not have preoperative prism adaptation. 2. If those patients who respond to prism adaptation are more accurately corrected by operating for the prism adapted angle or the original angle of deviation. 3. If there are clusters of input variables, (e.g. age, size of deviation, sensory status, refractive error, or AC/A ratio) that help to predict which patients are more likely to respond to the prism adaptation test. In an effort to answer these questions a double randomization study has been designed. Two-thirds of the patients will be randomly selected to go through prism adaptation prior to surgery. One-third of the patients will have surgery based on the amount of crossing measured using routine examination techniques. Of those patients who respond to the prisms, one-half will have surgery based on the amount of prism required to