[A new strategy for automated static perimetry].
The threshold of sensation in perimetry is a range where the probability of perception varies between 0% and 100%. The size of the range is dependent on sensitivity: it increases towards lower sensitivities. A new measurement strategy is presented where the luminance steps between the presentations vary according to the actual luminance level. Luminance steps and threshold variation are always kept in a constant relation. Thus, efficiency of perimetric measurements shall be improved. Already a single crossing of the threshold with dynamic steps gives reproducible results. In one field with 54 points, the mean standard deviation of 3 repeated measurements was 19% greater than that of a conventional 4dB-2dB-double-crossing strategy, but the test time was 56% less.
Weber
J
J
Universitäts-Augenklinik, Köln.
D000328:Adult; D006801:Humans; D008838:Microcomputers; D012016:Reference Values; D012684:Sensory Thresholds; D012815:Signal Processing, Computer-Assisted; D012984:Software; D058609:Visual Field Tests / Q000295:instrumentation*
Eine neue Strategie für die automatisierte statische Perimetrie.