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Evaluation of total keratometry and its accuracy for intraocular lens power calculation in eyes after corneal refractive surgery

Journal of Cataract & Refractive Surgery Aug 11, 2019

Wang L, et al. - In this retrospective case series, researchers compared the accuracy of total keratometry (TK) and standard keratometry (K) from a swept-source optical coherence tomography biometer for intraocular lens (IOL) power calculation in eyes with prior corneal refractive surgery. The differences between the TK and K and their connection with K were evaluated. Findings revealed that the differences between TK and K were positively linked to the K in eyes with prior myopic laser in situ keratomileusis (LASIK)/photorefractive keratectomy (PRK) and hyperopic LASIK/PRK. In the myopic LASIK/PRK group, Barrett True-K and Haigis-TK produced significantly lower MAEs than Haigis did. In IOL power calculation, the precision of Haigis-TK was comparable with that of Haigis-L and Barrett True-K in eyes with previous corneal refractive surgery.
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