Eyetracking-enhanced VEP for nystagmus

Self, James, Dunn, Matt, Carter, Perry, Shawkat, Fatima and Osborne, Daniel (2020) Eyetracking-enhanced VEP for nystagmus. ARVO meeting: ARVO meeting, Online. 15 Jun 2017 - 20 Jun 2020 .

Abstract

Visual evoked potential (VEP) testing is an essential first stage in the diagnostic workup of patients with infantile nystagmus (IN). VEPs are an important factor in the diagnosis of albinism, which accompanies IN in ~28% of cases, as well as chiasmal, optic nerve and neurometabolic disease that can all present with IN. VEPs are also used to assess prognostic visual ability in cases of retinal dystrophy and optic nerve disease. Despite being used regularly in those with IN, VEP testing requires patients to keep the eyes still; something that people with IN naturally cannot do. Fixation instability during VEP testing is believed to reduce VEP signal amplitude, and as a result, the reliability of VEP may be reduced in one of the patient groups that needs it the most. This study investigates whether VEP signal quality (amplitude) can be improved in people with IN, by triggering acquisition only during the foveating (slow) periods of the nystagmus waveform.

This record has no associated files available for download.

Contributors

Author: James Self

Download statistics