Dr.Niharika
Introduction:Determining the power of IOL to be implanted after cataract extraction is a crucial factor in the postop refractive status and visual acuity.Materials and method:A prospective study was done in 51 eyes of 40 patients, having senile cataract with high axial myopia.Complete ocular examination and cataract workup was done with preop A-scan and keratometry measurement.Implanted IOL powers were used to calculate the predicted postoperative refractive error by IOL power formulas:SRK/T, Hoffer Q and Haigis.With each formula, the mean error was calculated from the difference between the formula predicted refractive error and the actual postop refractive error.The smallest mean error indicated the formula with best predictive accuracy.Discussion:SRK/T, Hoffer Q and Haigis showed mean error +0.20D, -0.63D and -0.41D respectively.SRK/T showed smallest mean error hence more accurate.Conclusion:All formulas are comparable having mean error less than ±1D in eyes with high axial myopia.
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