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- W2077312861 abstract "To compare measures of peripapillary retinal nerve fiber layer (RNFL) thickness, optic disc topography, and central foveal thickness generated using 2 different Stratus optical coherence tomography (OCT) instruments.Ten normal subjects and 10 glaucoma subjects were included. One randomly selected eye per subject was scanned consecutively using a fast RNFL thickness protocol, fast macular thickness map, and fast optic disc protocol by 2 experienced operators on 2 instruments. The order of the machines and operators were randomized. The output power of each machine was measured using an optical power meter. For each OCT measurement 2 factor fixed effects analyses of variance were performed and a restricted maximum likelihood variance component analysis of the proportion of variance due to subject, operator, and machine was calculated.Significant differences (P<or=0.003) between OCT instruments were observed in average, superior, and inferior RNFL thickness and central foveal thickness values among normal eyes; and average and superior RNFL thickness and cup/disc area ratio values among glaucomatous eyes. Overall, the intermachine variability (0.0% to 16.4%) was larger than the interoperator variability (0.0% to 2.4%) for all OCT measurements. In the glaucoma group the variability due to machine differences was 2.6 microm for the average RNFL thickness, 5.7 microm for the superior RNFL thickness, 0 microm for the inferior RNFL thickness, 0.03 microm for the cup/disc area ratio, 0.01 microm for the cup/disc vertical ratio, and 2.8 microm for the average foveal thickness.Measurements of RNFL thickness, optic disc topography, and central foveal thickness significantly differ between OCT instruments." @default.
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- W2077312861 date "2007-05-01" @default.
- W2077312861 modified "2023-09-26" @default.
- W2077312861 title "A Comparison of Structural Measurements Using 2 Stratus Optical Coherence Tomography Instruments" @default.
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- W2077312861 doi "https://doi.org/10.1097/ijg.0b013e3180391a72" @default.
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