A study regarding efficacy of various intraocular lens power calculation formulas in a subset of Indian myopic population.
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Date
2014-07
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Abstract
Efficacy of intraocular lens power calculation formulas in a
subset of Indian myopic population. Retrospectively reviewed
43 patients who underwent phacoemulsification with high
axial length (AL) (>24.5 mm, range 24.75‑32.35 mm). The power
of the implanted intraocular lens (IOL) was used to calculate
the predicted post‑operative refractive error by four formulas:
Sanders‑Retzlaff‑Kraff (SRK II), SRK/T, Holladay 1, and Hoffer Q.
The predictive accuracy of the formulas was analyzed by
comparing the difference between the “actual” and “predicted”
postoperative refractive errors. Repeated measures analysis
of variance (ANOVA) tests were done to have pair‑wise comparisons between the formulas and P < 0.05 was considered
significant. A subcategory of axial length 24.5‑26.5 mm was also
tested. Holladay 1, Hoffer Q and SRK/T formulas showed a slight
tendency toward resultant hyperopia, with mean error of +0.24
diopters (D), +0.58 D, and +0.92 D, respectively. The Holladay 1
formula provided the best predictive result overall.
Description
Keywords
High myopia, intraocular lens power calculation, long axial length
Citation
Mitra Ashish, Jain Elesh, Sen Alok, Tripathi Shubhi. A study regarding efficacy of various intraocular lens power calculation formulas in a subset of Indian myopic population. Indian Journal of Ophthalmology. 2014 July ; 62 (7): 826-828.