Figure 1 FVEP: indicated that the peak time of the P2 wave in the left eye was slightly delayed relative to the right eye, and the amplitude of the right eye was lower than that in the left eye
图 2 双眼视盘 + 黄斑区 OCT:未见明显异常
Figure 2 OCT of the optic disc and macula of both eyes showed no obvious abnormality
图 3 眼眶 MRI 平扫 + 增强:双眼未见视神经长 T2 及 T1 增强信号
Figure 3 Orbital MRI scan with enhanced enhancement showed that there was no long T2 and T1 enhanced signal of the optic nerve in both eyes
2 讨 论
非器质性视力下降也称为心因性或功能性视力下降,除视力下降外,还可伴有视野缺损,多由于精神心理疾病导致的转换障碍引起,也有部分患者为诈病以获取利益[1-2]。患者主诉视力下降或伴有其他视觉功能障碍,但客观检查均未见任何能够解释症状的器质性疾病[3]。非器质性视力下降患者最常见的视野缺损类型表现为向心性缩小,其中三叶草改变最具特征性[4]。使用动态视野检查可以发现此类患者的视野范围随着检查的进行而逐渐缩小,需要注意与视网膜疾病引起的向心性视野缩小相鉴别[5]。OCT 能够准确测量视盘周围神经纤维厚度以及黄斑区神经节细胞厚度,利用 OCT 对可疑非器质性视力下降患者进行随访,可以进一步明确是否存在视神经损害的证据[6]。
1、河北省卫健委青年科技课题 (20170942; 20170948)。 This work was supported by the Youth Science and Technology Project of
Hebei Provincial Health and Family Planning Commission (20170942; 20170948) .
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