Lin Nan, Lu Wei, Wang Jing-hui
Beijing Tongren Ophthalmic Center, Capital University of Medical Sciences, Beijing 100730, China.
Zhonghua Yan Ke Za Zhi. 2006 Feb;42(2):139-44.
To understand the clinical variety of zero disparity, crossed disparity and uncrossed disparity in intermittent exotropia before and after strabismus surgery.
100 cases of intermittent exotropia were involved in the study. Before and after surgery, zero disparity stereo-acuity, crossed disparity and uncrossed disparity stereo-acuity were examined with stereogram designed by Yan Shaoming, distance fusion range and distance stereo-acuity were examined with traditional and random dot synoptophore stereogram. The patients were divided into four groups based on the results of the stereogram examination before surgery.
In the 100 cases, there was no coexistence of zero disparity and uncrossed disparity, no coexistence of crossed and uncrossed disparity, and no existence of only crossed disparity or only uncrossed disparity. Postoperative zero disparity, crossed disparity, uncrossed disparity, distance fusion range and distance stereo-acuity improved significantly compared with the preoperative results for each group (P < 0.01). The comparison of distance fusion range was not prominent before and after strabismus surgery in the 4 groups (P > 0.05). The distribution of distance stereo-acuity was prominent after strabismus surgery in the 4 groups (P < 0.01). Distance stereo-acuity rebuilding after surgery in group 1 and group 2 was better than that in group 3 and group 4.
(1) In the cases with intermittent exotropia, zero disparity stereo-acuity, crossed disparity and uncrossed disparity stereo-acuity are abnormal. The sequential damage of stereopsis is uncrossed disparity, crossed disparity and zero disparity. The sequential rebuilding of stereopsis is zero disparity, crossed disparity and uncrossed disparity. (2) The serious damage or disappearance of uncrossed disparity stereo-acuity is the indication of intermittent exotropia surgery for perfect binocular vision rebuilding.
了解间歇性外斜视患者斜视手术前后零视差、交叉视差和非交叉视差的临床变化情况。
本研究纳入100例间歇性外斜视患者。手术前后，采用闫少明设计的立体视图检查零视差立体视锐度、交叉视差和非交叉视差立体视锐度，采用传统和随机点同步视野计检查远距离融合范围和远距离立体视锐度。根据术前立体视图检查结果将患者分为四组。
100例患者中，不存在零视差与非交叉视差共存、交叉视差与非交叉视差共存的情况，也不存在仅交叉视差或仅非交叉视差的情况。与术前相比，各组术后零视差、交叉视差、非交叉视差、远距离融合范围和远距离立体视锐度均有显著改善（P < 0.01）。四组患者斜视手术后远距离融合范围的比较差异不显著（P > 0.05）。四组患者斜视手术后远距离立体视锐度的分布差异显著（P < 0.01）。1组和2组术后远距离立体视锐度重建情况优于3组和4组。
（1）间歇性外斜视患者中，零视差立体视锐度、交叉视差和非交叉视差立体视锐度均异常。立体视功能的损害顺序为非交叉视差、交叉视差和零视差。立体视功能的重建顺序为零视差、交叉视差和非交叉视差。（2）非交叉视差立体视锐度严重损害或消失是间歇性外斜视手术重建完美双眼视觉的指征。
