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The wide-angle pattern electroretinogram

✍ Scribed by G. W. Aylward; Vaegan F. A. Billson

Publisher: Springer-Verlag
Year: 1989
Tongue: English
Weight: 427 KB
Volume: 73
Category: Article
ISSN: 0012-4486
DOI: 10.1007/bf00155096

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✦ Synopsis

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 ~ x 86 ~ 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.

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