Preoperative Grading of Visual Function by Pattern Evoked Electroretinogram and Visual Evoked Cortical Potentials in Patients with Sellar and Parasellar Tumors

  • R. G. Lorenz
  • W. Steudel
  • W. Heider
  • R. Lorenz
Conference paper


One of the major effects on the health of patients with sellar or parasellar tumors is impairment of the visual system by direct or indirect damage to the optic nerve, chiasma, or optic tract. Despite successful surgical intervention many of these patients do not regain normal visual function. A persistent visual impairment is, as a rule, caused by an irreversible degeneration of nerve fibers with subsequent degeneration of retinal ganglion cells. Preoperative ophthalmological examinations in these patients are usually limited to determining visual acuity and visual fields and to the ophthalmoscopic inspection of the optic disc.


Visual Acuity Pituitary Adenoma Retinal Ganglion Cell Visual Function Cortical Potential 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • R. G. Lorenz
    • 1
  • W. Steudel
    • 1
  • W. Heider
    • 1
  • R. Lorenz
    • 1
  1. 1.Frankfurt/M.Germany

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