In group 3 consisting of 4 cases, only the abnormal zero disparity stereo acuity was found.
第3组4例，为仅查到不正常的近零视差立体视锐度者。
The sequential damage of stereopsis in intermittent exotropia is uncrossed disparity, crossed disparity and zero disparity.
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。
Objective To understand the clinical variety of zero disparity, crossed disparity and uncrossed disparity in intermittent exotropia before and after strabismus surgery.
目的探讨间歇性外斜视患者手术前后近零视差、交叉视差及非交叉视差的临床变化规律。
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