Recovery of Reliability by Retest After a 5-Minute Interval in Frequency Doubling Technology Perimetry |
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Authors: | Hidetoshi Tsukamoto Satoshi Mukai Aiko Iwase Hiromu K Mishima |
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Institution: | (1) Department of Ophthalmology and Visual Sciences, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan;(2) Department of Ophthalmology, Tajimi Hospital, Tajimi, Japan;(3) Department of Ophthalmology and Visual Sciences, Hiroshima University Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan |
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Abstract: | Purpose In frequency doubling technology (FDT) perimetry, the incidence of tests classified as unreliable is higher in the second-tested left eye than in the first-tested right eye when perimetry is performed without a rest period. The purpose of this study was to determine whether the incidence of unreliable results was reduced when the retest began after a 5-min rest period. Methods The subjects were 978 residents of Miyoshi City, Japan, who underwent FDT perimetry during a medical checkup. FDT perimetry was always performed first on the right eye and then on the left eye without a rest interval. When the results were determined to be unreliable, FDT perimetry was repeated after a 5-min rest interval. Results The perimetric results were determined to be unreliable in one eye of 119 subjects; the results of the first-tested right eye were unreliable in 24 (20.2%), and the results of the second-tested left eye were unreliable in 95 (79.8%) subjects. This difference in the incidence of reliability was significant (P < 0.001). After a 5-min rest interval, the percentage of eyes with reliable results recovered to 92% of the right eyes and to 86% of the left eyes. Conclusions The incidence of unreliable results in FDT perimetry of the second-tested left eye was higher than that of the first-tested right eye when tests were performed without a rest interval. However, the incidence of unreliability in the eye was decreased when the retest was performed after a 5-min rest interval.?Jpn J Ophthalmol 2006;50:380–382 © Japanese Ophthalmological Society 2006 |
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Keywords: | fatigue frequency doubling technology reliability retest |
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