Retrospective multicenter comparison of 14 IOL power calculation formulas (with and without posterior corneal curvature [PCC] input) in 3,738 eyes with prior myopic laser vision correction (M-LVC) undergoing cataract surgery across U.S. centers (Oct 2017–Aug 2025), using IOLMaster 700 biometry and subjective refraction at 21–90 days postop.
PCC-based formulas outperformed non-PCC counterparts (p <0.0001). Best PCC formulas: Cooke K6 (MAE 0.37 D), PEARL-DGS, EVO 2.0, and Barrett True K (all 0.38 D). Best non-PCC formulas: K6 and EVO 2.0 (both MAE 0.40 D). In short eyes (AL <23.5 mm) and steep corneas (K ≥43 D)—22% of the cohort—K6 gained >13% more eyes within ±0.50 D vs. Barrett True K; gains were clinically negligible in typical post-M-LVC eyes.
- M-LVC history was surgeon-reported without independent verification, risking misclassification. - No pre-LVC biometry available; no-history formulas only. - Study limited to eyes with satisfactory postoperative visual acuity, potentially excluding poor outcomes.
For post-myopic LVC cataract surgery, use PCC-capable modern formulas (K6, EVO 2.0, PEARL-DGS, or Barrett True K with PCC) when full biometry is available—especially in short eyes (AL <23.5 mm) or steep corneas (K ≥43 D). When full biometry is unavailable, Shammas-Cooke is a reasonable fallback.
