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Optokinetic nystagmus in patients with central field defects
  1. Department of Neurology, Neuro-Ophthalmology Unit, Ghent University Hospital, De Pintelaan 185, B-9000 Ghent, Belgium
  1. luc.crevits{at}

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Editor,—We read with interest the article by Valmaggia et al 1 who studied optokinetic nystagmus (OKN) in patients with macular degeneration. They noted abnormalities of OKN gain only in patients with large central scotomas. Therefore, an intact macula seems …

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