Author(s): Weber J
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Abstract 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.
This article was published in Fortschr Ophthalmol
and referenced in Journal of Clinical & Experimental Ophthalmology