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Purpose: To evaluation the accuracy of the IOL power calculation formulae measured by IOL Master and applanation ultrasonography for the Tecnis ZCB00 IOL Methods: We performed a retrospective study of 170 eyes in 121 patients who underwent cataract surgery in our hospital with AMO Tecnis ZCB00 IOL.s. The SRK/T formula was used to predict the patient’s implanted IOL power. Differences in the predicted refractive errors between IOL Master and ultrasonography were analyzed and factors attributed to the differences were also analyzed. Three months after cataract surgery, mean numeric error and mean absolute error were analyzed. Results: SRK/II and SRK/T formulas calculated using ultrasonography showed differences compared to the same formulas calculated using IOL Master, in which hyperopic shift was also demonstrated. No definite factor was attributed to the differences between the 2 methods. Although the 3 formulas of IOL Master showed no significant difference in refractive errors, the SRK/T formula calculated using IOL Master showed the least mean absolute and numeric errors. Conclusions: IOL Master is considered more suitable when determining proper AMO Tecnis ZCB00 IOL power in cataract surgery. The hyperopic shift should be considered when calculating the IOL power using only ultrasonography. J Korean Ophthalmol Soc 2014;55(4):527-533

Formula Comparison for Intraocular Lens Power Calculation Using IOL Master and Ultrasound for the ZCB00 IOL