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Vertical optokinetic nystagmus | Anat Bachar Zipori, MD; Nasrin Najm-Tehrani, FRCS Ed (Ophth), FRCSC | Visual depiction of the vertical OKN drum test. The vertical optokinetic drum test is an exam used to elicit vertical optokinetic nystagmus (OKN) when there is horizontal nystagmus. The hand-held "optokinetic" drums or tapes that are used to elicit smooth movements primarily test the pursuit system.... | Vertical Optokinetic Nystagmus; OKN Drum Test |
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Horizontal Right Optokinetic Nystagmus | Anat Bachar Zipori, MD; Nasrin Najm-Tehrani, FRCS Ed (Ophth), FRCSC | Visual depiction of the horizontal OKN drum test. The hand-held "optokinetic" drums or tapes that are used to elicit smooth movements primarily test the pursuit system. This video supplements Paediatric Neuro-ophthalmology: Visual Acuity Assessment Strategies: https://collections.lib.utah.edu/ark:/... | Horizontal Right Optokinetic Nystagmus; OKN Drum Test |