Abstract
Purpose :
To compare the accuracy of recent intraocular lens power formulas in cataract surgery patients with axial length of 22.0 mm or less.
Methods :
We retrospectively analyzed 42 eyes of 32 patients underwent phacoemulsification and implantation of Tecnis ZCB00 IOL (Johnson & Johnson Vision). Barrett Universal II, Cooke K6, EVO 2.0, Hill-RBF, Hoffer® QST, Kane, Pearl DGS, and Hoffer Q formulas were evaluated. Optical biometry was performed with Lenstar LS 900 (Haag-Streit AG, Switzerland). The mean absolute error (MAE), mean numeric error(MNE), and the percentage of eyes with prediction error(PE) within ±0.25 D, ±0.50 D, ±0.75 D, ±1.00 D, and ±2.00 D were analyzed.
Results :
Barrett universal II formula had the smallest MAE (0.29 D±0.26) and Hoffer® QST formula had the smallest MNE (-0.01 D±0.42). Barrett universal II formula yielded the highest percentage of PE within ±0.25 D (61.90%). The percentage of PE within ±0.50 D was higher in Cooke K6 (85.71%), Pearl-DGS (80.95%) and EVO 2.0 (80.95%) formula, whereas Hoffer Q formula yielded the lowest percentage (64.29%). Hoffer Q formula had the largest MAE and MNE.
Conclusions :
In eye with axial length ≤ 22.0mm, the new formulas including Barrett Universal II, Cooke K6, Pearl-DGS and EVO 2.0 formula showed excellent accuracy.
This abstract was presented at the 2024 ARVO Annual Meeting, held in Seattle, WA, May 5-9, 2024.