Eyeworld

22 | EYEWORLD | DECEMBER 2023 ASCRS NEWS by Timothy Grosel, MD, Mung Yan Lin, MD, Samera Ahmad, MD, and Jared Raabe, MD* Emory Eye Center residents *All authors contributed equally to this work. China, from July 2018 to August 2022. Demo- graphic data, biometric measurements, surgi- cal details, as well as postoperative refraction and best-corrected visual acuity (BCVA) were collected. The study evaluated 11 formulas: Barrett Universal II, Emmetropia Verifying Op- tical, Hoffer QST, Kane, Ladas Super Formula, Pearl-DGS, Radial Basis Function (RBF), Haigis, Hoffer Q, Holladay 1, and SRK/T. The predicted postoperative spherical equivalent refraction was derived. To assess the predictive accuracy of the formulas, five parameters were assessed for each formula: the mean absolute prediction error (MAE), the median absolute prediction error (MedAE), the root-mean-square absolute prediction error (RMSAE), the percentage of eyes within ±1 D of prediction error (PE), and the formula performance index (FPI). Results Included in the study were 947 eyes with an average patient age of 56.81 years. The most common primary retinal pathology was retinal detachment (64.4%). In the study, 7.1% of eyes EYEWORLD JOURNAL CLUB EyeWorld Journal Club review Review of "Choice of intraocular lens calculation formula for cataract patients with prior pars plana vitrectomy" E yes that have undergone pars plana vitrectomy (PPV) have worse refractive outcomes compared to eyes that have not undergone PPV. 1 Several new IOL calculation formulas have improved refractive outcomes in these eyes 2 ; however, the optimal IOL calculation formula is still under debate. Further, risk factors for a poor refractive outcome are unknown. Zhang et al. sought to determine the optimal IOL calculation formula to use preoperatively in eyes that have previous- ly undergone PPV. Methods This was a retrospective chart review study in- cluding 974 patients with prior PPV who under- went phacoemulsification and IOL implantation at Zhongshan Ophthalmic Center, Guangzhou, Jeremy Jones, MD Residency Program Director Emory Eye Center Emory University School of Medicine Atlanta, Georgia Emory Eye Center residents, from left: Timothy Grosel, MD, Samera Ahmad, MD, and Jared Raabe, MD Source: Emory Eye Center

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