DR. RESHMA RANADE

DR. ANUJ SATIJA, Dr. LUCI KAWERI, Dr. NAREN SHETTY, Dr. ROHIT SHETTY

Abstract

Purpose: To compare the accuracy of the Kane formula with SRK T and Barrett universal II formula in myopic eyes.

Methods: Patients undergoing uneventful phacoemulsification, in eyes having axial length greater than 26mm and 30 day post-operative BCVA better than 6/12 were included. Optimized lens constants were used to calculate the predicted refraction with each formula, which was then compared with the manifested outcomes. Refractive prediction error, mean absolute error (MAE), median absolute error (MedAE) and percentage of eyes within different diopters of absolute refractive errors were evaluated.

Results: 217 eligible eyes were studied. The Kane formula had statistically significant lower MAE and MedAE compared with all formulas (p<0.05). It had the maximum percentage of eyes under ±0.25D to ±1D (p<0.05). Conclusions: The Kane formula was superior in accuracy to the Barrett universal II and SRK T across all ranges of myopia.

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