摘要
目的 了解间歇性外斜视患者交叉视差和非交叉视差的临床变化。方法 对 5 5例间歇性外斜视患者 ,术前应用颜少明的《立体视觉检查图》检测其近零视差、交叉视差及非交叉视差 ,并根据检测情况分为 3组进行分析。结果 第 1组 2 5例 ,近零视差立体视锐度正常者占 4 8 0 % ,其交叉视差和非交叉视差立体感知度检测值均不在正常范围 ,交叉视差者的立体感知度检测值比非交叉视差者大 ,差异有显著意义 (t =84 3 5 ,P <0 0 0 0 1)。第 2组 2 6例 ,近零视差立体视锐度正常者占30 8% ,其交叉视差立体感知度检测值不在正常范围 ,未见有非交叉视差者。第 3组 4例 ,为仅查到不正常的近零视差立体视锐度者。 5 5例中 ,无近零视差仅和非交叉视差共存者 ,也无交叉视差和非交叉视差各自独立存在者 ,亦无交叉视差和非交叉视差两者共存者。结论 (1)本组间歇性外斜视患者近零视差立体视锐度及交叉视差和非交叉视差立体感知度不健全 ;(2 )间歇性外斜视患者视差的损害顺序依次为非交叉视差、交叉视差、近零视差。 (3)双眼黄斑颞侧视网膜对应的是交叉视差 。
Objective To understand the clinical variety of crossed disparity and uncrossed disparity in intermittent exotropia. Methods Zero disparity stereo acuity, crossed disparity and uncrossed disparity stereo acuity of 55 cases with intermittent exotropia were examined with stereogram designed by Yan Shaoming before surgery. Results In group 1 consisting of 25 cases, the zero disparity stereo acuity of normal persons was 48%, the values of crossed disparity and uncrossed disparity stereoacuity were not in the normal range, and the crossed disparity was larger than the uncrossed disparity stereo acuity ( t =843 5, P <0 000 1). In group 2 including 26 cases, the zero disparity stereo acuity of normal person was 30.8%, the value of crossed disparity was abnormal, and the uncrossed disparity was not found. In group 3 consisting of 4 cases,only the abnormal zero disparity stereo acuity was found. In the 55 cases, there was no coexistence of zero disparity and uncrossed disparity, no existence of only crossed disparity or only uncrossed disparity, and no coexistence of crossed and uncrossed disparity. Conclusions (1) In the cases with intermittent exotropia, the zero disparity stereoacuity, the crossed disparity and uncrossed disparity stereoacuities are abnormal. (2) The sequential damage of stereopsis in intermittent exotropia is uncrossed disparity, crossed disparity and zero disparity. (3) It is proved in the clinic that the binocular temporal retinae correspond to the crossed disparity and the binocular nasal retinae correspond to the uncrossed disparity.
出处
《中华眼科杂志》
CAS
CSCD
北大核心
2002年第8期462-465,共4页
Chinese Journal of Ophthalmology
关键词
间歇性外斜视
临床观察
视觉差异
立体感知度
Exotropia
Zero disparity
Crossed disparity
Uncrossed disparity
Vision disparity
