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. 2022 Dec 10;10:1. doi: 10.1186/s40662-022-00320-3

Fig. 4.

Fig. 4

Meta-analysis results comparing all instruments with respect to keratometry. The upper right shows the direct comparisons meta-analysis between each pair of formulas and the bottom left shows the network meta-analysis between each pair of formulas. Weighted mean differences (95% confidence intervals) are calculated by column. Ks, keratometry in the steepest meridian; Kf, keratometry in the flattest meridian; Km, mean keratometry; NA, not available. The underline data indicate the statistical significant effect