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- W2146713596 abstract "Purpose: To establish a normative data base with respect to corneal pachymetry and elevation tomography appropriate for refractive surgery screening of hyperopic individuals. Methods: 100 eyes of 51 consecutive hyperopic patients were examined with the Oculus Pentacam HR to determine corneal pachymetry and anterior and posterior elevation values at the apex and thinnest point. All patients were otherwise screened as normal and all principal meridians were hyperopic. Results were compared to a previously studied data base of myopic individuals from the same practice. Results: The average corneal thickness at the apex and thinnest point was not significantly different between the hyperopic and myopic groups (P>0.05 at both locations). The mean anterior elevation at the apex was0.4 ± 1.9 µm in the hyperopic group vs. 1.6 ± 1.3 µm in the myopic group (P<0.001). The mean anterior elevation at the thinnest point was-0.1 ± 2.2 µm in the hyperopic group vs. 1.7 ± 2.0 µm in the myopic group (P<0.001). The mean posterior elevation at the apex was5.7 ± 3.6 µm in the hyperopic group vs. 0.8 ± 3.0 µm in the myopic group (P<0.001). The mean posterior elevation at the thinnest point was10.6 ± 5.7 µm for the hyperopic group vs. 3.6 ± 4.1 µm for the myopic group (P<0.001). When adjusted for age, the posterior elevation changes remained statistically significant. Conclusions: Hyperopic individuals exhibited greater variation in posterior tomographic elevation values than a comparable myopic group. Currently used data bases need to be adjusted for screening hyperopic individuals to reduce the number of false positives associated with using a myopic biased data set." @default.
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- W2146713596 date "2011-01-01" @default.
- W2146713596 modified "2023-10-09" @default.
- W2146713596 title "Tomographic Normal Values for Corneal Elevation and Pachymetry in a Hyperopic Population" @default.
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- W2146713596 doi "https://doi.org/10.4172/2155-9570.1000130" @default.
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