Essentials of photometry for clinical electrophysiology of vision.
Electrophysiological testing of the visual system requires familiarity with photometry. This technical note outlines the concepts of photometry with a focus on information relevant to clinical ERG and VEP testing. Topics include photometric quantities, consideration of pupil size, specification of brief extended flash stimuli, and the influence of the spectral composition of visual stimuli. Standard units and terms are explained in the context of the ISCEV standards and guidelines for clinical electrophysiology of vision.
McCulloch
Daphne L
DL
Vision Sciences, Glasgow Caledonian University, Cowcaddens Road, Glasgow G4 0BA, UK. dlmc@gcal.ac.uk
Hamilton
Ruth
R
D055724:Electrophysiological Phenomena; D004594:Electrophysiology; D004596:Electroretinography; D005074:Evoked Potentials, Visual; D006801:Humans; D008027:Light; D010775:Photic Stimulation / Q000379:methods; D010783:Photometry; D017785:Photons; D012160:Retina / Q000528:radiation effects; D014785:Vision, Ocular / Q000502:physiology*