【摘要】 目的:了解扫描翻转图像视觉诱发电位视力 (SPVER视力 )在视神经损伤和视野改变疾病中应用的准确性。方法 :比较 5 1例 6 6眼有不同视神经损伤和视野改变疾病的SPVER视力和对数视力表视力。在SPVER视力的测定中我们用了 8个不同空间频率的光栅条纹连续扫描 ,所得的数据经离散傅立叶分析后 ,获得振幅 空间频率曲线 ,并通过外推法估计其视力。结果 :5 1例 6 6眼中 ,视力表视力在 0 0 8～ 1 2 ,SPVER视力在 2 0 /2 0 0～ 2 0 /2 0 ,两者的总体相关系数为 0 6 2 2。其中不同疾病两种视力的相关系数有较大的区别 ,从中浆的r =0 80 7到外伤性视神经病变的r =0 2 82。结论 :SPVEP视力与视力表视力有良好的相关性 ,它是一项客观、快速的视力测定方法 ,但同时应注意到各种疾病引起视神经损伤后对SPVER视力可能会带来较大的误差 ,因此在得出结论时应对疾病进行综合考虑更多还原

【Abstract】 Objective:To evaluate the accuracy of sweep pattern visual evoked response acuity (SPVER-A) in the diagnosis of the diseases with abnormal visual function. Methods:SPVER-A and visual acuity were measured and compared in 51 patients (66 eyes) with various diseases.For SPVER-A,8 squared vertical gratings were continuously presented as stimuli.The responses were averaged and displayed through the discrete Fourier transform on the monitor.The SPVER acuity was determined through extrapolating the SPVER amplitude-spatial frequency function to baseline. Results:Vision ranged from 0 08～1 2 with international visual acuity and from 20/2000～20/20 with SPVER-A.The overall correlation was r=0 622 between the SPVER-A and visual acuity.The correlation varied from r=0 807 in eyes with central serous chorioretinalpathy to r=0 282 in eyes with optic nerve trauma.Discrepancies were found in certain diseases with the highest disparity in optic nerve trauma. Conclusions:SPVER-A has a good correlation to visual acuity and is an effective mean in estimating vision objectively on the diseases with abnormal visual function.更多还原