Abstract
The clinical specialty of otoneurology has recently undergone a major change due to the availability of new instruments based on small video cameras. Eye movements and nystagmus can be observed at the bedside with extremely high sensitivity (and relatively low cost), using “video-Frenzel goggle” devices. These resemble scuba goggles having cameras set over the eyes, and infrared illumination which allows observation of the eyes in total darkness. As the image of the eyeball is typically displayed on a large screen TV, and total darkness is easy to obtain, small details of nystagmus can easily be appreciated. This gigantic improvement in methodology has begun to bear fruit with refinements of the bedside examination. An example is the article by Choi et al. in this issue,1 which is concerned with head-shaking nystagmus (HSN) in persons with medullary lesions. HSN, described in 1907 by Barany,2 is a provoked jerk nystagmus …
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