Eyeworld

JUN 2019

EyeWorld is the official news magazine of the American Society of Cataract & Refractive Surgery.

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58 | EYEWORLD | JUNE 2019 C Contact information Name: ORNEA that differed from the preoperative IOL power calculation (n=913) showed a difference of 0.19 (P<.0001) between intraoperative aberrometry and the preop formula calculation. The absolute median error in cases in which the IA recom- mendation differed from the preoperative IOL power calculation (n=913) showed a difference of 0.21 (P<.0001)," he said. In these cases, the percentage of eye with an absolute prediction error ≤0.50 D was 86.7% for IA compared to 59.6% had the preop calculated IOL power been implanted. Additional analyses are needed to deter- mine whether the level of experience of a sur- geon influences the results. Dr. Breen thinks the differences may be even more pronounced for more experienced surgeons or when using more advanced power calculation formulas, which might narrow the gap. error can be misleading sometimes because they look like they are very small differences. But they result in a big difference in the eyes that end up within a half diopter of predicted post- operative spherical equivalent," he said. The difference in mean absolute value of the prediction error was 0.12 between intraop- erative aberrometry and preoperative formu- la-calculated value (P<.0001). The difference in the absolute median error was also 0.12. As far as the percentage of eyes with a prediction error ≤0.50 D, in the completed data set the IA percentage was 82.4% while the preop calcula- tion would have resulted in 68.3%. "In those cases where the aberrome- try recommendation was different from the preoperative plan, the differences were more pronounced," he explained. "The mean ab- solute value of the prediction error for cases in which the IA recommended an IOL power EXPERIENCE EYEWORLD 24/7 EyeWorld.org • Recent articles in web-friendly format • Searchable archives from 2007 to present • EyeWorld Weekly news feed • Trending videos • Live Twitter feed • CME and non-CME supplements • Links to all EyeWorld video sites continued from page 56 Financial interests Breen: Alcon Contact information Breen: michael.breen@alcon.com

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