为探讨视觉诱发电位（VEP）对垂体肿瘤的诊断价值。对21例垂体肿瘤患者的双眼进行视力、视野、眼底及VEP检查分析。结果：42只眼VEP均出现不同程度异常或无波，异常改变达100％，尤其对单眼出现程度不同的视力下降．视野改变而另眼视力正常、视野仅表现为生理盲点扩大的患者，行VEP检查时双眼均可出现重度异常或无波。结论：VEP检查在垂体肿瘤的诊断中较视力、视野、眼底改变更敏感，有利于患者的早期诊断。 To investigate the diagnostic value of visual evoked potential (VEP) in pituitary tumors. Visual acuity, visual field, fundus and VEP examination were performed on 21 eyes of pituitary tumor patients. RESULTS: There were abnormal or no wave in VEP in 42 eyes. The abnormal change was 100%, especially for eyes with different degrees of visual acuity. Patients with altered visual field and normal vision in other eyes and visual field only showed expansion of physiological blind spots. Both eyes showed severe abnormalities or no waves during VEP examination. Conclusion: VEP examination is more sensitive than visual acuity, visual field and fundus in the diagnosis of pituitary tumors, which is helpful for early diagnosis of patients.