Cionni RJ, et al. - Using data from a large database of patients who have undergone cataract surgery, researchers assessed the spherical equivalent outcomes of intraoperative aberrometry (IA) power calculations vs the surgeons’ preoperative power calculations in eyes implanted with AcrySof® IQ T3 intraocular lenses (IOLs). Data collected by an IA system from multiple centers in the US were evaluated. Compared with the preoperative formula, the percentage of eyes with prediction error ≤ 0.50 D was significantly higher with IA. The percentage of eyes with prediction error ≤ 0.50 D was 83.3% for IA and 68.8% for the preoperative formula when the powers of the implanted IOL and the preoperatively planned lens were different. According to this retrospective analysis, for eyes implanted with low toric IOL, IA produces more precise spherical equivalent results than preoperative formulas.