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October 13, 2015; 85 (15) Video NeuroImages

Iridodonesis as a cause of recurrent vertigo

Hagen Kunte, Friedemann Paul, Florence Pache, Jan Dörr, Judith Bellmann-Strobl, Lutz Harms, Golo Kronenberg
First published October 12, 2015, DOI: https://doi.org/10.1212/WNL.0000000000002025
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A 56-year-old woman complained of recurrent attacks of vertigo. Attacks lasted no longer than a second and could be easily provoked by abrupt eye movements. Vertigo disappeared when the left eye was covered. Symptoms had begun after left-sided cataract surgery resulting in subluxation of the left lens. The characteristic feature of iridodonesis is the tremulousness of the iris with eye movement (video on the Neurology® Web site at Neurology.org). While in many cases iridodonesis is asymptomatic, we speculate that in our patient, the instability of the optical system results in a trembling image on the retina, which, in turn, causes irritation in downstream brain regions.

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  • Supplemental data at Neurology.org

  • Study funding: No targeted funding reported.

  • Disclosure: The authors report no disclosures relevant to the manuscript. Go to Neurology.org for full disclosures.

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