Intraocular lens power calculation in the elderly population using the Kane formula in comparison with existing methods

Abstract

Purpose: To assess the accuracy of the Kane formula for intraocular lens (IOL) power calculation in comparison to established formulas in the elderly population.

Comparison of Accuracy of Intraocular Lens Power calculation for Eyes with an Axial Length Greater Than 29.0 mm

“…However, this formula was inferior to the Olsen formula and ranked as the second accurate one in our study, although without statistical signi cance. Since the subjects of those previous studies mainly were European ancestry, the authors thought the differences in results could be due to the different ethnicity of our patients, or the relatively small sample size of our study [19,20]. Further evaluations including more Chinese patients of extremely high myopia are required for con rmation.…”

Accuracy of the Kane Formula for Intraocular Lens Power Calculation in Comparison with Existing Formulas: A Retrospective Review

“…Cataract extraction is the most frequently performed surgical intervention worldwide, and its demand is continuously rising due to an increase in elderly population. 9 11 12 13 With the growing popularity, patients' refractive expectations after the cataract surgery continue to increase, and achieving the desired refractive outcome has become a key principle in recent years. 7 Identifying an IOL formula that best predicts the postoperative refractive outcome is one of the most important factors leading to a successful cataract surgery.…”

“…The Kane formula is a novel IOL power calculation formula that uses theoretical optics which also incorporates both regression and artificial intelligence components. 3 5 9 The Kane formula requires the AL, ACD, K values, and gender to make its estimations, and LT and CCT are optional values which are known to improve the accuracy of the formula. 3 5 Since the advent of the Kane formula in September 2017, multiple publications have demonstrated its outstanding performance in IOL power calculation, yielding the lowest MAEs and MedAEs, and the highest percentage of eyes within ±0.25D, ±0.50D, and ±1.00D of prediction errors compared to other well-known existing formulas.…”

“…Melles, et al 8 analyzed a retrospective data of 18501 patients who underwent cataract surgery with either SN60WF and SA60AT implants and reported that the Kane formula was the most accurate, with 83% of the eyes predicted within 0.50D of the actual postoperative refractive result when compared with Olsen, Barrett Universal II, Evo, Hill-RBF, Holladay1, Holladay2, Haigis, SRK/T, and HofferQ. Reitblat, et al 9 compared the Kane formula with Barrett Universal II, Haigis, HofferQ, Holladay1, and SRK/T formulas in the elderly population, and showed that the Kane formula was found to be of equal precision to the Barrett Universal II and superior to the HofferQ, Holladay1, and SRK/T formulas. Savini, et al 14 analyzed the results of IOL power calculation using measurements by a swept-source optical coherence tomography (SS-OCT) optical biometer.…”

“… 8 Many additional studies have demonstrated Kane formula's potency in IOL power predictability, and some of the studies even reported more favorable results by Kane compared to Barrett Universal II formula, which was known to be the most accurate among modern formulas for years. 3 5 9 However, many of the published studies about Kane formula analyzed data from multiple IOLMaster models for assessment, and often omitted lens thickness (LT) and central corneal thickness (CCT) as optional metrics for IOL power calculation due to the lack of availability of the newest version of IOLMaster device. 5 6 …”