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Newer generation formulas generally outperformed older generation formulas, with SRK/T performing the best of older formulas, especially when using TK values.
Presented by Michael Heath, the study, “Comparison of Keratometry vs. Total Keratometry with Multivariable IOL Formulas Keratoconic Eyes," showed that accurate refractive predictions remain difficult in patients with keratoconus, and if TK is available, surgeons should use it in patients with keratoconus regardless of formula.
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