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Postoperative corneal power of R1 to R8 and mean of the central 3 mm zone estimated by three methods: simulated keratometry (simK), true net power (TNP), and total corneal refractive power (TCRP). Significant differences were found between the three corneal powers from R1 to R8 and the central 3 mm (ANOVA: P < 0.05).
