Article Text

Download PDFPDF

The pattern electroretinogram in glaucoma: an evaluation by relative amplitude from the Bjerrum area.
  1. I Watanabe,
  2. H Iijima and
  3. S Tsukahara
  1. Department of Ophthalmology, Yamanashi Medical College, Tamaho, Japan.


    A new concept for evaluating the pattern electroretinogram (PERG) in glaucoma and its clinical application are described. The PERG was elicited by two different stimulus fields, namely, the whole central retinal area with a radius of 18 degrees and the paracentral ring area between the radius of 10 degrees and 18 degrees. The amplitude of the PERG for each stimulus field and the ratio of them were analysed for 30 patients with glaucoma or ocular hypertension. Among these only a small number of eyes were detected as abnormal when we evaluated the amplitude itself either with the central stimulus or the paracentral ring stimulus, whereas the ratio of the two values was below normal in some cases of advanced glaucoma. We conclude that the ratio of the paracentral to central PERG is useful for detecting glaucoma.

    Statistics from

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.