Taiwan Journal of Ophthalmology (Jan 2022)

Accuracy of different lens power calculation formulas in patients with phacomorphic glaucoma

  • Seyed Ali Tabatabaei,
  • Melika Samadi,
  • Mohammad Soleimani,
  • Hosein Fonoodi,
  • Sepideh Ghods,
  • Bahman Inanloo

DOI
https://doi.org/10.4103/tjo.tjo_1_22
Journal volume & issue
Vol. 12, no. 2
pp. 164 – 169

Abstract

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PURPOSE: The purpose of the study was to determine the most accurate formula for intraocular lens (IOL) power calculation among five currently used formulas in eyes with phacomorphic glaucoma (PG) undergoing cataract extraction surgery. MATERIALS AND METHODS: In this prospective interventional case series Patients diagnosed with PG were undergone uneventful phacoemulsification and IOL implantation. After 3 months, the refractive outcome for each formula was evaluated with mean prediction error (PE), mean absolute error (MAE), and the percentages of eyes within 0.25 D and 0.5 D of predicted error. RESULTS: Twenty-three patients completed the study. PEs were significantly different among the 5 formulas (P = 0.019), and Holladay I had the least error (−0.02 ± 1.11). Haigis formula had the highest hyperopic shift (0.37 ± 1.22), highest MAE (0.99 ± 0.78) and the lowest percentages of desired PEs, while the SRK II produced the greatest percentages. The overall differences in MAE between the 5 formulas were statistically insignificant (P = 0.547). CONCLUSION: In some extreme situations like patients with PG, lower generation of IOL power calculation formulas may still produce more acceptable refractive outcomes.

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