A method for comparing electrophysiological, psychophysical, and structural measures of glaucomatous damage

Vivienne C. Greenstein, Phamornsak Thienprasiddhi, Robert Ritch, Jeffrey M. Liebmann, Donald C. Hood

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Objective: To develop a method for comparing multifocal visual-evoked potential (mfVEP) responses and behaviorally determined visual fields with structural measures of the optic nerve head. Methods: Humphrey 24-2 visual fields and mfVEPs were obtained from each eye of 20 patients with open-angle glaucoma. Monocular and interocular analyses were performed to identify locations with abnormal mfVEP responses. Optic discs were assessed with a confocal scanning laser ophthalmoscope (Heidelberg Retina Tomograph II). The image of the optic nerve head was divided into 6 sectors. The rim and disc area measurements for each sector were compared with those in a normal database using Moorfields regression analysis. The optic nerve head measurements for the 6 sectors were related to the Humphrey visual field locations and the 60 sectors of the mfVEP display. Results: Of 240 sectors tested (40 eyes × 6 sectors), 18.8% on Humphrey visual field, 22.1% on mfVEP, and 10.8% on confocal scanning laser ophthalmoscopic testing were significantly different from those of control subjects. There were no significant deficits in 165 sectors. There was agreement for 86.7% of the sectors when the Humphrey visual field and mfVEP results were compared. The confocal scanning laser ophthalmoscopic results were in agreement for 84.6% of these sectors. Conclusions: The method used allows for a comparison among measures of visual function and a structural measure of the optic nerve head. In general, the results of the functional and structural measures showed agreement; however, there were clear examples of disagreements that merit further study.

Original languageEnglish
Pages (from-to)1276-1284
Number of pages9
JournalArchives of Ophthalmology
Volume122
Issue number9
DOIs
StatePublished - Sep 2004
Externally publishedYes

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