THE MULTI-CHANNEL VEP TOPOGRAPHIES IN PATIENTS WITH LATE-STAGE GLAUCOMA

• 来源期刊: 眼科学报
• 学科: 医学
• 年，卷（期）: 1998,（1）
• 页码范围: 21-26
• 页数: 6页
• 分类号: R775
• 语种: 中文

摘要

<正> Purpose: To study the clinical application of multi-channel VEP topographies in patients with late-stage glaucoma.Methods: The multi- channel checkerboard reversal VEP waves of 25 normal persons and 15 patients with late-stage gloucoma were recorded and analyzed, All patients were examined using Humphrey Field Analyzer. The VEP topographies of multi-channel VEP waves were shown by computer processing system.Results: In normal subjects , the topographies showed symmetric distribution to full-field pattern stimulation . In all patients with late-stage glaucoma, even whose visual field was severely damaged, multi-channel VEP could be recorded, All channels showed simple 'NPN' wave form, N1,N2 waves were not conspicuous, even both were lost, all channels showed the reduced amplitudes of PI waves, and longer latency. The multi-channel VEP topographies showed irregular distribution, Some showed amplitude asymmetry, other limited or widespread, lateralized.Conclusions : Despite the severely damaged visual fiel