白内障术前视觉电生理检查的临床意义

摘要

目的探讨白内障术前视觉电生理检查对于术后视功能评估的价值.方法回顾分析白内障患者218例(260眼)术前闪光视网膜电图(F-ERG)及图形视觉诱发电位(P-VEP)两种视觉电生理检查结果与术后最佳矫正视力(BCVA)的关系.比较两种视觉电生理检查结果与术后最佳矫正视力的一致性,并进行相关性分析.结果对于F-ERG检查组,F-ERG结果与术后BCVA一致的白内障患眼百分比为62.9%,不一致百分比为37.1%；而P-VEP组,一致百分比为68.2%,不一致百分比为31.8%,两组相比无显著统计学差异(P>0.25).术前F-ERG a、b波振幅与术后BCVA呈正线性相关性(r分别为0.316、0.294,P值均<0.01),P-VEP P100波振幅与术后BCVA无明显线性相关性(r=0.172,P>0.5).结论两种视觉电生理检查(F-ERG与P-VEP)均可有效评估白内障患者术后患眼视力恢复情况,F-ERG准确性相对较高,但其精确性均尚有不足,有一定的不一致性.%　　Objective To evaluate the significance of visual electrophysiological examination before cataract surgery in predicting the postoperative visual function. Methods The visual electrophysiological examinations before surgery were used to evaluate the visual function after ultrasonic phacoemulsification and intraocular lens implantation in218cataract case. The consistency between the postoperative best corrected visual acuity and each of the two visual electrophysiological examination results:flash electroretinogram and pattern visual evoked potential were compared. Results The consistency between F-ERG and BCVA was62.9%,while the consistency between P-VEP and BCVA was 68.2%.The difference wasn’t statistically significant. Conclusions The two visual electrophysiological examinations before ultrasonic phacoemulsification both can effectively evaluate the visual function after surgery, and the F-ERG is better.However,their accuracy is not high enough.