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The "Nystagmocatcher"

The Nystagmocatcher can be coupled to any commercially available smartphone. It is placed in front of the eye, and a video recording can be made with the smartphone. (Source: Melliti A, van de Berg M, van de Berg R. Capturing nystagmus during vertigo attacks using a smartphone: adherence, characteristics, pearls and pitfalls. J Neurol 2023;270[12]:6044-56. Creative Commons Attribution 4.0 International [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)