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Cataract Surgery
Pediatrics

Study finds SRK/T formula most accurate for pediatric cataract surgery

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The SRK/T formula is the most accurate for calculating intraocular lens (IOL) power in pediatric cataract surgery, especially for children aged 2-5 years, outperforming both older and newer formulas in this age group, according to a study.

The research evaluated 4 IOLMaster 700 integrated formulas: SRK/T, Hoffer Q, Haigis, and Barrett Universal II (BUII). In addition, the study assessed online-available formulas EVO 2.0, Hill RBF 3.0, Hoffer QST, Kane, and PEARL DGS.

Findings revealed a statistically significant difference between SRK/T and most other formulas, except for Hoffer Q, Hoffer QST, and BUII (P < 0.05). SRK/T achieved the lowest median absolute error (MedAE) of 0.63 D, followed by BUII (0.66 D), Hoffer Q, and Hoffer QST (0.68 D). Notably, SRK/T also had the highest percentage of cases within ±0.50 D (43%).

For patients aged 2 to 5 years, the SRK/T formula demonstrated significantly better outcomes than all other formulas (P < 0.05), with a MedAE of 0.44 D and 58.33% and 87.50% of cases within ±0.50 D and ±1.0 D of intended refraction, respectively.

Reference
Helaly HA, Said MH, Elnaggar OR, et al. Accuracy of Modern and Traditional Intraocular Lens Power Calculation Formulas in Pediatric Cataract Surgery. Clin Ophthalmol. 2024;18:1761-1769. doi: 10.2147/OPTH.S468294. PMID: 38915745; PMCID: PMC11195671.

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