外斜弱视的多导VEP研究

对20例恒定性外斜(简称恒斜)弱视和16例间歇性外斜(简称间斜)弱视进行了多导VEP研究。结果表明,所有36例病人在刺激弱视眼所引起的VEP振幅,均明显低于健眼,而且潜伏期亦延长,当以全视野刺激双眼所引起的VEP与刺激单(健)眼相比,恒斜弱视组不存在VEP总和现象,而间斜弱视组则有较弱的VEP总和。分别以半视野刺激时,部分间斜弱视病人的弱视眼、健眼以及恒斜弱视的健眼均出现颞侧视网膜抑制现象,而恒斜弱视眼的这种半侧视网膜抑制现象则不明显。

Multi-channel VEP studies of exotropic amblyopia

36 children of exotropic amblyopia, 20 of constant exotropia and 16 of intermittent exotropia, were performed multi-channel VEP examinations to find that all amplyopic eyes manifested VEPs of lower amplitude and longer latency. With full-field stimulation to both eyes, summation of VEP was absent in the group of constant exotropia while it was weakly present in the group of intermittent exotropia. With half-field stimulation, temporal retinal suppression was noted in all healthy eyes and some of the amblyopic eyes of the intermittent exotropia group while it was absent in the amblyopic eyes of the constant exotropia group.