多焦视诱发电位的双眼对称性分析

目的 观察正常人多焦视诱发电位(mfVEP)的双眼对称性。 方法 应用VERIS Science 4.0视觉诱发反应图像系统对36名正常人的72只眼进行mfVEP测试，刺激图形为带图形的飞镖盘，对应的视角为25°。图形中有60个小块，每个小块包括4×4个黑白相间的格子，由二元伪随机m-序列控制其黑白翻转形成视觉刺激。 结果 左右眼各对应象限的P1波潜伏期及振幅配对 t 检验显示差异无统计学意义。双眼同侧视野的潜伏期与振幅的数据差异大于相应视野象限的数据差异。右眼或左眼4个象限组间比较显示双眼各自鼻上与颞下、鼻下象限P1波潜伏期之间差异有统计学意义，振幅方面仅左眼颞上与颞下象限之间差异有统计学意义。 结论 正常人双眼mfVEP以视网膜对称性优于视皮层的对称性。 (中华眼底病杂志, 2006, 22: 42-44)

The symmetry of multifocal visual evoked potential between both eyes in normal subjects

Objective To analyze the symmetry of multifocal visual evoked potential (mfVEP) between both eyes in normal subjects. Methods The monocular mfVEP of both eyes in thirty-six normal subjects (72 eyes) was tested with VERIS Science 4.0. The stimulus was the pattern reversal dart array consisted of 60 sectors each included 16 black-white reverse patterns. The visual stimulation was controlled by the binary pseudo-random m-sequences and subtended approximately 25 degrees. Results There existed no statistically significant difference of P1 latencies and amplitudes between correspondent quadrant visual field of both eyes. The data difference of the ipsilateral quadrant visual fields was greater than those of the correspondent quadrant visual field. The comparison among four quadrant visual fields in right eye or left eye each showed that there was statistically significant difference of P1 latencies between the superionasal quadrant visual field and inferiotemporal or inferionasal quadrant visual fields. Conclusions The symmetry of normal mfVEP is more dominant in retina than that in visual cortex. (Chin J Ocul Fundus Dis, 2006, 22: 42-44)