Under controlled conditions the differences between duplicated examinations with the Goldmann kinetic perimeter and the Krakau/Heijl static computerized perimeter were evaluated. Kinetic visual fields were obtained independently by two well trained examiners and duplicate examinations were performed by computer perimetry. The differences between the two examinations were statistically evaluated using quantitative criteria. The agreement between first and second examination--based on normal and pathologic findings--was 72% for the Goldmann and 88% for the computer perimeter. The greater reproducibility of central visual field testing with the computer perimeter is most probably due to the subjectivity of the observer in the kinetic manual technique. The computer obviously represents a standardized observer using a constant strategy with a fixed time course. The computerized perimeter was easy to operate and did not require a specially trained technician. All the patients in whom kinetic visual field testing was possible were able to undergo computerized perimetry.
The reproducibility of perimetrie results on the blind spot has been investigated under controlled conditions using the kinetic perimetry of Goldmann and the computerized static perimeter of Krakau-Heijl. At defined time intervals kinetic perimetry was performed twice by two independent well-trained perimetrists on 178 eyes of 107 patients; the same eyes and patients were examined twice with the computer perimeter as well. Perimetrie results obtained from 158 eyes were considered for statistics. There was qualitative agreement based on the alternative ‘normal’ or ‘pathological’ in kinetic perimetry in 74% of the double examinations and in 89% in computer perimetry. Identical size of the blind spot in repeated examinations was found in 34% with the Goldmann perimeter and in 78% with the computer perimeter. Observer variability of the static computer perimetry of the blind spot was compared with the variability of the results on the rest of the central visual field.
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