阅读诱发的视觉模糊。
Reading-evoked visual dimming.
作者信息
Manor R S, Yassur Y, Hoyt W F
机构信息
Department of Ophthalmology, Beilinson Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Petah-Tikva, Israel.
出版信息
Am J Ophthalmol. 1996 Feb;121(2):212-4. doi: 10.1016/s0002-9394(14)70589-6.
PURPOSE
To carry out a neuroradiologic investigation in a monocular 49-year-old patient who during the past five years described symptoms of dimming of central vision in his left eye, which was provoked only by reading.
METHODS
Computed tomography and magnetic resonance imaging were performed.
RESULTS
An orbital apex intraconal tumor situated laterally to and above the optic nerve was found.
CONCLUSIONS
Reading-evoked visual dimming can be a variant of gaze-evoked amaurosis. The optic nerve displaced laterally and superiorly, and stretched by the act of reading, may be compressed between the tumor above and the contracted inferior rectus muscle inferiorly.
目的
对一名49岁单眼患者进行神经放射学检查，该患者在过去五年中描述其左眼出现中央视力模糊症状，仅在阅读时诱发。
方法
进行了计算机断层扫描和磁共振成像。
结果
发现一个位于视神经外侧和上方的眶尖圆锥内肿瘤。
结论
阅读诱发的视力模糊可能是凝视诱发黑矇的一种变体。因阅读行为而向外侧和上方移位并受牵拉的视神经，可能被上方的肿瘤和下方收缩的下直肌挤压。
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