[Results of Rauschfeld examinations with the Tübingen electronic campimeter. A comparison with current perimetry procedures].

In a total of 121 patients scotomata, detected by white-noise campimetry, were presented graphically in a standardized manner. The intensity of brightness and strength of motion ("noise") perception within the scotoma, as well as the reliability of the patients' statements, were taken into consideration. The results of white-noise campimetry were compared with conventional raster perimetry using the Tübingen automatic perimeter. In each case the examiner was naive with respect to the result of the other method. In 77% of all comparisons, the correspondence between the results obtained with white-noise campimetry, on the one hand, and automatic perimetry on the other was sufficiently close, so that one method confirmed the other. However, when white-noise campimetry was used alone congenital visual field defects, long-standing retinal scotomata, and old suprageniculate lesions mostly could not be detected. When these defects were excluded from the analysis, the correspondence between the two methods increased to 85% (in the 89 remaining patients). Special applications of white-noise campimetry as a screening method or for the purpose of patient self-examination are discussed. Furthermore, it is suggested that this method could be used as a tolerance test for revealing expansion of the scotoma under short-term artificial elevation of the intraocular pressure.