Adjustments to Stimulation Frequency and Duration of STEP VEPs in Paediatric CVI

Abstract

Recent research has demonstrated that the agreement between VEP and subjective VA is influenced by both technical and clinical factors [1-3].  In normal visual development, spatial resolution threshold is limited by the density of retinal bipolar cells [4] which initiate three distinct functional pathways; magnocellular, parvocellular, and koniocellular [5].  Ophthalmological conditions during development with pathology before the LGN and resulting in moderate or severe visual impairment [6] may preferentially preserve the magnocellular pathway making steady state VEPs the ideal assessment.