综合视觉电生理检测对白内障术后视功能恢复的评估

目的 评价术前综合视觉电生理检测在判断白内障手术视功能预后中的作用。方法 白内障患者３１５例（４０８眼）术前常规检测图形翻转视觉诱发电位（ＰＶＥＰ）、红蓝光视网膜电图（ＦＥＲＧ）和视网膜电图的振荡电位（ＯＰｓ）。正常对照组１６２例（２６６眼）。术后检查眼底，术后３ｍｏ查矫正视力。结果 术后矫正视力≥０．５（Ⅰ组）和〈０．５（Ⅱ组）者与对照组相比，术前ＰＶＥＰ的Ｐ１００波振幅均下降、潜伏期均延长，后

Comprehensive examination of visual electrophysiology of visual function assessment after cataract operation

Objective　To study the value of comprehensive examination of visual electrophysiology in prognosis of visual function after cataract operation.Methods　315 patients with cataract(408 eyes) underwent preoperative routine examination with pattern reversal visual evoked potential(PVEP), red and blue flicker electroretinogram(ERG) and oscillatory potential (OPs). Normal control group included 162 cases (266 eyes). All of the ocular fundi were examined postoperatively and corrected visual acuities were obtained 3 months after operation. Results　Postoperative corrected visions ≥0.5(Ⅰ) and ＜0.5(Ⅱ) in case group compared with that in control group, amplitudes of PVEP P100-wave decreased significantly and PVEP P100-wave latency times prolonged significantly in group Ⅰ and Ⅱ. There was much more prominent changes in P100-wave of group Ⅱ due to other factors influencing visual function. There wasn't significant difference of the amplitudes and the latency times of a-wave and b-wave of Red-Blue ERG in group Ⅰ and the control group preoperatively. The amplitudes of a-wave and b-wave of Red ERG decreased, the latency times of a-wave and b-wave of Red ERG prolonged, the amplitudes of a-wave and b-wave of Blue ERG decreased but latency times didn' t prolong in group Ⅱ. The value of OPs decreased in groupⅡ compared with that of the control group, which was related to the retinopathy due to blood circulation obstruction.Conclusion　Combined examination of visual electrophysiology can estimate visual function thoroughly. The prognosis will be good if various examinations are normal before operation, but will not be good if PVEP P100 latency time prolong, the amplitudes of a-wave and b-wave of Red ERG decrease and the latency time prolong, the amplitudes of a-wave and b-wave of Blue ERG decrease and the value of OPs decrease.