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Abstract #5653 Published in IGR 2-1
Clinical evaluation with the 'Swedish Interactive Threshold Algorithm' (SITA)
Remky A; Arend OKlinische Monatsblätter für Augenheilkunde 2000; 216: 143-147
BACKGROUND: The 'Swedish Interactive Threshold Algorithm' (SITA) is a new technique minimizing test time without reduction of data quality. In this retrospective study, the authors compared visual fields assessed with the conventional full-threshold technique with those by SITA, and analyzed qualitative and quantitative differences, and the test time reduction with SITA. PATIENTS AND METHODS: One hundred and thirteen eyes with different glaucomatous field damage of 66 patients, aged from 22-89 years, were included. The patients underwent perimetry with each strategy within four months. Exclusion criteria were eyes with progressing glaucomatous damage, and high rate of false-positive results or artifacts by corrective glasses. RESULTS: The qualitative differences of the analysis were small: full threshold demonstrated more relative scotomas in eyes with normal SITA readings, whereas scotomas assessed with SITA were often pronounced as absolute scotomas. Average time reduction with SITA was 40% and depended on the severity of the glaucomatous stage. No reduction was found for advanced glaucoma, whereas normal fields using SITA were performed in half the time of the full-threshold strategy. CONCLUSIONS: Differences between SITA and conventional full-threshold testing may be related to the fatigue effects of the full-threshold strategy, due to the longer test time. The reduction in test time provides more motivation for more frequent visual field examinations, and thus better detection of early glaucoma or progressing visual field damage.LA: German
Dr. A. Remky, Augenklinik der RWTH Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany. remky@post.rwth.aachen.de
Classification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
