Lorance R W, Kaufman D, Wray S H, Mao C
Neurology. 1987 Jun;37(6):923-9. doi: 10.1212/wnl.37.6.923.
Contrast visual testing (CVT) is a psychophysical visual test of undetermined diagnostic capability in many neurovisual disorders. CVT of 32 controls and 39 patients was compared with the pattern visual evoked response (PVER) from each group. CVT was more sensitive than PVER in detecting visual dysfunction in pseudotumor cerebri and subclinical optic neuritis and showed potential in distinguishing papilledema from pseudopapilledema. PVER was more sensitive than CVT in detecting subclinical visual dysfunction in MS and optic nerve compression. Neither was abnormal in asymptomatic Leber's optic neuropathy. In nonorganic visual loss, CVT data were variable and inconsistent, supporting this diagnosis; PVER was consistently normal. Although in certain disease conditions, each detected subclinical visual dysfunction, neither CVT nor PVER provided specific information leading to an etiologic diagnosis.
对比视觉测试（CVT）是一种对多种神经视觉疾病诊断能力尚未确定的心理物理学视觉测试。将32名对照者和39名患者的CVT与每组的图形视觉诱发电位（PVER）进行比较。在检测假性脑瘤和亚临床视神经炎的视觉功能障碍方面，CVT比PVER更敏感，并且在区分视乳头水肿和假性视乳头水肿方面显示出潜力。在检测多发性硬化症和视神经受压的亚临床视觉功能障碍方面，PVER比CVT更敏感。无症状性Leber视神经病变两者均无异常。在非器质性视力丧失中，CVT数据可变且不一致，支持该诊断；PVER始终正常。尽管在某些疾病情况下，两者均检测到亚临床视觉功能障碍，但CVT和PVER均未提供导致病因诊断的具体信息。
