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.

• 第 2组 2 6例 ,近零视差立体视锐度正常者占30 8%25 ,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。