Yeolekar Aditya M, Shinde Kiran J, Qadri Haris
Department of ENT & Head and Neck Surgery, Smt. Kashibai Navale Medical College, Pune, India.
Clin Med Insights Ear Nose Throat. 2019 Oct 21;12:1179550619882012. doi: 10.1177/1179550619882012. eCollection 2019.
Vertigo is 1 of the most prominent and frequent neurological symptom. It is estimated that about 30% of all people need medical care once in their life due to this index symptom. The neurological expertise required is usually scarce in underprivileged areas. One has to look for spontaneous nystagmus, and perform Dix-Hallpike maneuver and Head Impulse test specifically to differentiate central from peripheral vertigo. The nystagmus, that is spontaneous, involuntary to-and-fro movement of the eyeball which aids in the diagnosis, can be better elicited by Frenzel glasses, Munich glasses. These devices consist of the combination of magnifying glasses and a lighting system to detect eye movements better than routine examination.
To test usefulness of modified Google cardboard as Frenzel glasses in poor resource setting.
A modified Google cardboard was used in 52 consecutive cases of vertigo and compared with examination with naked eye. The device consists of 2 magnifying lenses, 1 for each eye with power of +24 dioptres.
The tool was found to be better for identifying spontaneous nystagmus, in Dix-Hallpike maneuver and during head impulse test as compared with the naked eye owing to the property of magnification and inhibition of fixation. Being a cheaper alternative and handy, it could be carried by every doctor in any setting.
眩晕是最突出且常见的神经症状之一。据估计，约30%的人一生中会因这一标志性症状而需要就医。贫困地区通常缺乏所需的神经科专业知识。必须寻找自发性眼球震颤，并专门进行 Dix-Hallpike 试验和头部脉冲试验，以区分中枢性眩晕和周围性眩晕。眼球震颤是眼球自发的、不自主的来回运动，有助于诊断，使用 Frenzel 眼镜（慕尼黑眼镜）能更好地引出这种震颤。这些设备由放大镜和照明系统组合而成，比常规检查能更好地检测眼球运动。
在资源匮乏地区测试改良版谷歌纸盒作为 Frenzel 眼镜的效用。
对52例连续眩晕病例使用改良版谷歌纸盒，并与肉眼检查进行比较。该设备由两个放大镜组成，每只眼睛一个镜片，屈光度为 +24。
由于具有放大和抑制注视的特性，该工具在识别自发性眼球震颤、Dix-Hallpike试验及头部脉冲试验中比肉眼检查效果更好。作为一种更便宜且方便的选择，任何环境下的医生都可以携带它。
