title: The wide-angle pattern electroretinogram. Relation between pattern electroretinogram amplitude and stimulus area using large stimuli.
abstract: Pattern electroretinograms (PERGs) were recorded from two normal human subjects in response to various spatial frequencies and stimulus areas. The maximum stimulus area was 75 degrees x 86 degrees which was achieved by using a standard TV monitor and a reduced viewing distance. The amplitude of the PERG increased with area in an approximately logarithmic fashion over the range investigated. The explanation relates to non-linearities of the stimulus, the retinal image and neural processing. The wide-angle PERG may be useful in the assessment of retinal diseases affecting the mid-peripheral inner retina, such as diabetic retinopathy.
authors.affiliation: Department of Ophthalmology, Sydney Eye Hospital, Woolloomooloo, NSW, Australia.
authors.forename: G W
authors.initials: GW
authors.lastname: Aylward
authors.forename: V
authors.initials: V
authors.lastname: Billson
authors.forename: F A
authors.initials: FA
authors.lastname: Billson
mesh_terms: D004596:Electroretinography; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D012160:Retina / Q000502:physiology*; D012858:Size Perception / Q000502:physiology*